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Journal articles on the topic 'Phase transition'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

SOLLER, H., and D. BREYEL. "SIGNATURES IN THE CONDUCTANCE FOR PHASE TRANSITIONS IN EXCITONIC SYSTEMS." Modern Physics Letters B 27, no. 25 (2013): 1350185. http://dx.doi.org/10.1142/s0217984913501856.

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In this paper, we analyze two phase transitions in exciton bilayer systems: a topological phase transition to a phase which hosts Majorana fermions and a phase transition to a Wigner crystal. Using generic simple models for different phases, we discuss the conductance properties of the latter when contacted to metallic leads and demonstrate the possibility to observe the different phase transitions by simple conductance measurements.

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2

Shin, Dong-Hyeon, Seung-Han Lee, and Tae-Sik Cho. "Phase Transitions of Li₃PO₄ Solid Electrolyte for Secondary Batteries: A Real-Time Synchrotron X-ray Scattering Study." Science of Advanced Materials 16, no. 12 (2024): 1238–41. https://doi.org/10.1166/sam.2024.4737.

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The phase transitions of Li3PO4 solid electrolyte for secondary batteries during heating and isothermal annealing in air have been studied by using real-time synchrotron X-ray scattering. As results of the heating annealing in air, the crystal β-Li3PO4 phase only existed from RT to 440 °C. The crystal γ-Li3PO4 phase appeared at 450 °C and the crystal β-Li3PO4 phase disappeared at 480 °C. The transition from the β-Li3PO4 to the γ-Li3PO4 phases occurred mainly at 450 °C. In the early hours of the isothermal annealing at 450 °C in air, the β-Li3PO4 and the γ-Li3PO4 phases existed together. As the

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3

Hu, Xi Duo, De Hai Zhu, Zhi Feng Zeng, and Shao Rui Sun. "The Theoretical Study of the Cinnabar-to-Rocksalt Phase Transitions of HgTe and CdTe under High Pressure." Advanced Materials Research 1004-1005 (August 2014): 1608–14. http://dx.doi.org/10.4028/www.scientific.net/amr.1004-1005.1608.

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We performed the first-principle calculation to study the structures of cinnabar phase and the Cinnabar-to-rocksalt Phase transitions of HgTe and CdTe under high pressure. The calculated results show that for HgTe, the zincblende-to-cinnabar phase transition is under 2.2GPa, and the cinnabar-to-rocksalt phase transition is under 5.5 GPa; For CdTe, the two phase transitions occur under 4.0 GPa and 4.9 GPa, respectively, which well agree with the experimental results. The cinnabar-to-rocksalt phase transitions of most compounds, including HgTe and CdTe, except HgS are of first-order, and it is d

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4

Tang, Xiaochu, and Yuan Li. "Phase division and transition modeling based on the dominant phase identification for multiphase batch process quality prediction." Transactions of the Institute of Measurement and Control 42, no. 5 (2019): 1022–36. http://dx.doi.org/10.1177/0142331219881343.

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Batch processes are carried out from one steady phase to another one, which may have multiphase and transitions. Modeling in transitions besides in the steady phases should also be taken into consideration for quality prediction. In this paper, a quality prediction strategy is proposed for multiphase batch processes. First, a new repeatability factor is introduced to divide batch process into different steady phases and transitions. Then, the different local cumulative models that considered the cumulative effect of process variables on quality are established for steady phases and transitions

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5

Scott, Adam D., Dawn M. King, Stephen W. Ordway, and Sonya Bahar. "Phase transitions in evolutionary dynamics." Chaos: An Interdisciplinary Journal of Nonlinear Science 32, no. 12 (2022): 122101. http://dx.doi.org/10.1063/5.0124274.

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Sharp changes in state, such as transitions from survival to extinction, are hallmarks of evolutionary dynamics in biological systems. These transitions can be explored using the techniques of statistical physics and the physics of nonlinear and complex systems. For example, a survival-to-extinction transition can be characterized as a non-equilibrium phase transition to an absorbing state. Here, we review the literature on phase transitions in evolutionary dynamics. We discuss directed percolation transitions in cellular automata and evolutionary models, and models that diverge from the direc

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Krishnamoorthy, Aravind, Lindsay Bassman, Rajiv K. Kalia, Aiichiro Nakano, Fuyuki Shimojo, and Priya Vashishta. "Kinetics and Atomic Mechanisms of Structural Phase Transformations in Photoexcited Monolayer TMDCs." MRS Advances 3, no. 6-7 (2018): 345–50. http://dx.doi.org/10.1557/adv.2018.122.

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ABSTRACTRapid transitions between semiconducting and metallic phases of transition-metal dichalcogenides are of interest for 2D electronics applications. Theoretical investigations have been limited to using thermal energy, lattice strain and charge doping to induce the phase transition, but have not identified mechanisms for rapid phase transition. Here, we use density functional theory to show how optical excitation leads to the formation of a low-energy intermediate crystal structure along the semiconductor-metal phase transition pathway. This metastable crystal structure results in signifi

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7

Weidemann, Sebastian, Mark Kremer, Stefano Longhi, and Alexander Szameit. "Topological triple phase transition in non-Hermitian Floquet quasicrystals." Nature 601, no. 7893 (2022): 354–59. http://dx.doi.org/10.1038/s41586-021-04253-0.

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AbstractPhase transitions connect different states of matter and are often concomitant with the spontaneous breaking of symmetries. An important category of phase transitions is mobility transitions, among which is the well known Anderson localization1, where increasing the randomness induces a metal–insulator transition. The introduction of topology in condensed-matter physics2–4 lead to the discovery of topological phase transitions and materials as topological insulators5. Phase transitions in the symmetry of non-Hermitian systems describe the transition to on-average conserved energy6 and

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8

Nechaev, V. N., and A. V. Shuba. "The size effects on phase transitions in ferroics." Известия Российской академии наук. Серия физическая 87, no. 9 (2023): 1229–36. http://dx.doi.org/10.31857/s0367676523702174.

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The features of phase transitions temperature behavior in nanosized ferroics are discussed in the framework of phenomenological theories. It is shown that in the case of second-order transitions to both the commensurate and incommensurate phases, the critical temperature can shift significantly depending on the characteristic dimensions of the sample and the properties of the surface. In materials with the first-order phase transition, size effects have a significant influence on the nucleation process, leading to the transition temperature shift or even the phase transition type change have b

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9

Nguyen, Thi Phuong Thuy, Thi Van Anh Nguyen, and Van Thanh Ngo. "Phase transitions of smectic-isotropic phase in liquid crystals." Ministry of Science and Technology, Vietnam 66, no. 1 (2024): 1–7. http://dx.doi.org/10.31276/vjst.66(1).01-07.

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Smectic phases formed by rod-like molecules with long axes that are parallel and also arranged in planes. The smectic-isotropic phase transition is a phase change from the liquid crystal to the liquid phase. In this work, we use a mobile 6-state Potts model to study the nature of the smectic-isotropic phase transition. Microscopic interactions between neighbouring molecules in this model are supplemented with the Lennard-Jones potential. This study applies Monte Carlo simulation with the Wang-Landau algorithm to determine the characteristics of smectic-isotropic phase transitions. It is shown

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10

Irfan, Sheheera, Yasir A. Haleem, Muhammad Imran Irshad, Muhammad Farooq Saleem, Muhammad Arshad, and Muhammad Habib. "Tunability of the Optical Properties of Transition-Metal-Based Structural Phase Change Materials." Optics 4, no. 2 (2023): 351–63. http://dx.doi.org/10.3390/opt4020026.

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Phase transitions are an intriguing yet poorly understood aspect of transition-metal-based materials; these phase transitions can result in changes to the refractive index, absorption coefficient, and other optical properties of the materials. Transition-metal-based materials exist in a variety of crystalline phases and also have metallic, semi-metallic, and semi-conducting characteristics. In this review, we demonstrate that alloyed W- and Mo-based dichalcogenides enable phase transitions in structures, with phase transition temperatures that are tunable across a wide range using various allo

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Bauer, Michael, and Wilfrid E. Klee. "The monoclinic-hexagonal phase transition in chlorapatite." European Journal of Mineralogy 5, no. 2 (1993): 307–16. http://dx.doi.org/10.1127/ejm/5/2/0307.

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12

Zhang, Xinyu, Lidong Dai, Haiying Hu, and Chuang Li. "Pressure-Induced Reverse Structural Transition of Calcite at Temperatures up to 873 K and Pressures up to 19.7 GPa." Minerals 13, no. 2 (2023): 188. http://dx.doi.org/10.3390/min13020188.

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In situ Raman scattering and electrical conductivity experiments have been performed to investigate the structural phase transitions of calcite during the compressed and decompressed processes in a diamond anvil cell at temperatures of 298–873 K and pressures up to 19.7 GPa. Upon compression, calcite (CaCO3-I phase) underwent three structural phase transitions from CaCO3-I to CaCO3-II phases at 1.6 GPa, from CaCO3-II to CaCO3-III phases at 2.2 GPa, and from CaCO3-III to CaCO3-VI phases at 16.8 GPa under room temperature conditions, which were evidenced by the evolution of Raman peaks, as well

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13

Babaev A. B. and Murtazaev A. K. "The effect of nonmagnetic disorder on phase transitions of the first-order." Physics of the Solid State 65, no. 4 (2023): 619. http://dx.doi.org/10.21883/pss.2023.04.56004.407.

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Using the Monte Carlo method, weakly dilute magnetic systems described by two-dimensional 5-state Potts model, which in the pure state undergoes a phase transition first-order. Numerical studies have revealed that an insignificant quenched disorder, realized in the form of nonmagnetic impurities, can change the order of phase transition in magnetic systems described by the two-dimensional 5-state Potts model on a square lattice, for which a phase transition of the first-order is observed in a homogeneous state. It is shown that such a phase change the transition is due to the fact that nonmagn

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14

Kuryleva, Yulia N., Olga A. Chalaya, and D. A. Zakharyevich. "Phase Transitions in Perovskite Phases of Strontium Silicoantimonates." Materials Science Forum 845 (March 2016): 34–37. http://dx.doi.org/10.4028/www.scientific.net/msf.845.34.

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The paper presents the results of the study of phase transitions in the system Sr-Sb-Si-O by means of X-ray diffraction, thermal analysis, dielectric spectroscopy. Four effects are observed in the interval from room temperature to 800°C. The first and last are chemical transformations due to dehydration and loss of oxygen, respectively. The second is a transition from tetragonal to cubic perovskite structure, and the third is disordering transition in oxygen sublattice possibly due to the desorption of structural water molecules

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15

Paroli, Ralph M., Nancy T. Kawai, Ian S. Butler, and Denis F. R. Gilson. "Phase transitions in adamantane derivatives: 2-chloroadamantane." Canadian Journal of Chemistry 66, no. 8 (1988): 1973–78. http://dx.doi.org/10.1139/v88-318.

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The phase transition behaviour of 2-chloroadamantane, 2-C10H15Cl, has been investigated by differential scanning calorimetry (DSC), and FT-IR and Raman spectroscopy. Two transitions were detected by both DSC and vibrational spectroscopy at 231 and 178 K, on cooling, and at 242 and 227 K, on heating. The measured enthalpies were 8.3 kJ mol−1 for the first transition (phase I → phase II), and 0.47 kJ mol−1 for the second (phase II → phase III). The entropies were 35 and 2.3 J K−1 mol−1, respectively. These are similar to those observed for other 2-substituted adamantanes, but significantly diffe

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16

KIM, SANG PYO. "DYNAMICAL THEORY OF PHASE TRANSITIONS AND COSMOLOGICAL EW AND QCD PHASE TRANSITIONS." Modern Physics Letters A 23, no. 17n20 (2008): 1325–35. http://dx.doi.org/10.1142/s0217732308027692.

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We critically review the cosmological EW and QCD phase transitions. The EW and QCD phase transitions would have proceeded dynamically since the expansion of the universe determines the quench rate and critical behaviors at the onset of phase transition slow down the phase transition. We introduce a real-time quench model for dynamical phase transitions and describe the evolution using a canonical real-time formalism. We find the correlation function, the correlation length and time and then discuss the cosmological implications of dynamical phase transitions on EW and QCD phase transitions in

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17

Suhara, Masahiko, and Koichi Mano. "NQR and Phase Transitions in Hexachlorocyclopropane Crystal." Zeitschrift für Naturforschung A 45, no. 3-4 (1990): 339–42. http://dx.doi.org/10.1515/zna-1990-3-421.

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Abstract35Cl NQR and DSC studies on phase transitions in hexachlorocyclopropane (HCCP), C3Cl6 , are reported. It is found that HCCP has three solid phases: A high temperature disordered phase (Phase I) above 301 K (no NQR spectrum was observed); a metastable phase (Phase II), which exhibited 6 NQR lines from 77 to 270 K; a low temperature phase (Phase III) in which a 24-multiplet of 35Cl NQR lines at 77 K, the most complex multiplet spectrum ever reported was observed. DSC measurement shows a A-type transition at 301 K and a broad transition of very slow rate at 285 K. The structure and mechan

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18

Li, Jia Jie, Armen Sedrakian, and Mark Alford. "Relativistic Hybrid Stars with Sequential First-order Phase Transitions in Light of Multimessenger Constraints." Astrophysical Journal 944, no. 2 (2023): 206. http://dx.doi.org/10.3847/1538-4357/acb688.

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Abstract In this work, we consider the properties of compact stars in which quark matter has low- and high-density phases that are separated by a first-order phase transition. Thus, unlike the commonly considered case of a single phase transition from hadronic to quark matter, our models of hybrid stars contain sequential phase transitions from hadronic matter to low- and then to high-density quark matter phases. We extend our previous study of the parameter space of hybrid stars with a single phase transition to those with sequential phase transitions, taking into account the constraints on t

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19

Rakovan, John. "Phase Transition." Rocks & Minerals 81, no. 6 (2006): 467–69. http://dx.doi.org/10.3200/rmin.81.6.467-469.

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20

Rothman, Tony. "Phase Transition." Scientific American 259, no. 3 (1988): 30–31. http://dx.doi.org/10.1038/scientificamerican0988-30.

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21

Загребин, М. А., М. В. Матюнина, А. Б. Кошкин, В. Д. Бучельников та В. В. Соколовский. "Фазовые превращения в сплавах Fe-=SUB=-100-x-=/SUB=-Si-=SUB=-x-=/SUB=-: исследования ab initio". Физика твердого тела 62, № 5 (2020): 655. http://dx.doi.org/10.21883/ftt.2020.05.49224.24m.

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In present work, on the basis of structural and magnetic phase transition temperatures estimated theoretically from the first principles, the concentration phase diagram for Fe100-xSix (9.375 ≤ x ≤ 25.0 at.%) was plotted. Structural phase transition temperatures for the experimentally observed crystal structures were obtained from the structural optimization. The Curie temperatures were estimated from mean field approximation using ab initio calculated exchange coupling constants. Both structural and magnetic phase transitions temperatures are found in qualitative agreement with the experiment

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22

Sierant, Piotr, Giuliano Chiriacò, Federica M. Surace, et al. "Dissipative Floquet Dynamics: from Steady State to Measurement Induced Criticality in Trapped-ion Chains." Quantum 6 (February 2, 2022): 638. http://dx.doi.org/10.22331/q-2022-02-02-638.

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Quantum systems evolving unitarily and subject to quantum measurements exhibit various types of non-equilibrium phase transitions, arising from the competition between unitary evolution and measurements. Dissipative phase transitions in steady states of time-independent Liouvillians and measurement induced phase transitions at the level of quantum trajectories are two primary examples of such transitions. Investigating a many-body spin system subject to periodic resetting measurements, we argue that many-body dissipative Floquet dynamics provides a natural framework to analyze both types of tr

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23

Florêncio, Odila, Paulo Sergio Silva, José Antônio Eiras, Ducinei Garcia, and Eriton Rodrigo Botero. "Study of the Anelastic Behavior of PZT and PLZT Ferroelectric Ceramics." Defect and Diffusion Forum 326-328 (April 2012): 719–24. http://dx.doi.org/10.4028/www.scientific.net/ddf.326-328.719.

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The anelastic behavior of the ferroelectric ceramics (Pb)(Zr/Ti)O3(PZT) and (Pb/La)(Zr/Ti)O3(PLZT), with Zr/Ti = 65/35, La = 5 at.% and 8 at.%, was investigated in the region of the ferroelectric phase transitions. Anelastic spectroscopy experiments were performed in an acoustic elastometer system, operating in a kilohertz bandwidth, at temperatures rising from 300 K to 770 K, at a heating rate of 1 K/min, under pressure of 10-5mbar. Anelastic measurements on PZT showed only one anomaly, associated with the occurrence of a ferroelectric-paraelectric phase transition, while the PLZT data showed

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24

Shaginyan, V. R., J. G. Han, and J. Lee. "Fermion condensation quantum phase transition versus conventional quantum phase transitions." Physics Letters A 329, no. 1-2 (2004): 108–15. http://dx.doi.org/10.1016/j.physleta.2004.06.065.

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25

FENG, HONG-JIAN, XIAOYUN HU, and HUIJUAN CHEN. "STRUCTURAL AND MAGNETIC PHASE TRANSITIONS OF BiFeO3 INDUCED BY PRESSURE." Functional Materials Letters 06, no. 03 (2013): 1350026. http://dx.doi.org/10.1142/s1793604713500264.

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First-principles calculations on BiFeO3 under low-pressure region show that the rhombohedral-monoclinic and rhombohedral-orthorhombic phase transitions can be found around the critical pressure value, ~9 GPa.We suggest that the structure involve the combination of these three phases and change to the pure orthorhombic phase gradually as pressure is beyond the critical value. Moreover, it is a first-order structural phase transition, accompanied with antiferromagnetic–ferromagnetic transition.

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26

Beloborod’ko, S. I., A. G. Pedan, and I. O. Kulik. "Phase transitions in systems with local triplet pairs." Soviet Journal of Low Temperature Physics 12, no. 1 (1986): 12–14. https://doi.org/10.1063/10.0031417.

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We have studied transitions to the superconducting and charge-density wave (CDW) states as well as antiferromagnetic transitions in systems containing local triplet pairs. In a self-consistent field approximation we calculate the corresponding transition temperatures. It is shown that application of a magnetic field leads to a splitting of the transition to the superconducting state. We consider the possibility of the existence of several phases. We obtain the temperature for the transition to a mixed antiferromagnetic-CDW state. The entire phase diagram of the system is constructed.

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27

Siegel, D. P., W. J. Green та Y. Talmon. "Studying the mechanism of Lα/HII and Lα/QII phase transmissions in phospholipid liquid crystals with temperature-jump cryo-TEM". Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 432–33. http://dx.doi.org/10.1017/s0424820100169894.

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The transitions between lamellar (Lα), inverted cubic (QII), and inverted hexagonal (HII) liquid crystalline phases can be very rapid, despite drastic changes in system topology. The Lα phase is a stack of flat lipid bilayers, the HII phase is a hexagonal array of inverted rod micelles, and the QII phase is a lipid bilayer labyrinth with the geometry of an infinite periodic minimal surface. The mechanism of the transitions from the Lα a phase are of particular interest: they start with interbilayer events that are related to the process of biomembrane fusion, a ubiquitous and essential process

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28

Lu, Ping, Jiadong Zhou, Xinling Liu, et al. "Characterization of phase-transition-induced micro-domain structures in vanadium dioxide." Journal of Applied Crystallography 47, no. 2 (2014): 732–38. http://dx.doi.org/10.1107/s1600576714002854.

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The displacive structural phase transition of vanadium dioxide (VO2) from the high-temperature tetragonal rutile (R) phase to the low-temperature monoclinic M1 or M2 phase may induce the formation of a variety of domain structures. Here, all possible types of phase-transition-induced domain structures of the M1 and M2 phases have been theoretically formulated by using a general space group method. The predicted domain structures of the M1 phase, including mirror or rotation twins and antiphase domains, have been confirmed by transmission electron microscopy observation of VO2powders and films,

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29

Zarychta, Bartosz, Zbigniew Czapla, Janusz Przesławski, and Przemysław Szklarz. "Structure, ferroelasticity and Goldilocks zone phase transitions in C3H5N2Al(SO4)2·6H2O." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 77, no. 2 (2021): 225–31. http://dx.doi.org/10.1107/s2052520621001256.

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The single crystal growth and sequence of reversible phase transition are described for C3H5N2Al(SO4)2·6H2O. Thermal and structural analyses combined with dielectric studies and optical observations revealed the structural phase transition at T 1 = 339/340 K (I↔II) and T 2 = 347/348 K (II↔III) on heating and cooling, respectively. Both phase transitions are of the first-order type. The symmetry changes from monoclinic to trigonal phase. At 293 K, the large crystals are usually divided into numerous domains of the ferroelastic type that disappear above T 1 on heating and reappear below T 1 on c

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30

Zhou, Ling. "Nanoparticles-Induced Phase Transitions in A(BC)₃ Miktoarm Star Copolymers." Advanced Materials Research 905 (April 2014): 23–27. http://dx.doi.org/10.4028/www.scientific.net/amr.905.23.

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Phase transitions induced by nanoparticles in A(BC)3 miktoarm star copolymers are investigated by using self-consistent field and density functional theories. With increasing nanoparticle concentration, a variety of phase transitions are observed, including the transition from a hexagonal lattice phase with beads at the interface to a core-shell hexagonal lattice phase, the transition from a core-shell hexagonal lattice phase to a three-color lamellar phase, and the transition from a lamellar phase with beads at the interface to a three-color lamellar phase. The results provide an effective co

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31

Medina Cuy, Fabián G., and Fabrizio Dolcini. "Electron Density and Compressibility in the Kitaev Model with a Spatially Modulated Phase in the Superconducting Pairing." Condensed Matter 10, no. 1 (2025): 14. https://doi.org/10.3390/condmat10010014.

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A current flowing through a one-dimensional Kitaev chain induces a spatial modulation in its superconducting pairing, characterized by a wavevector Q, which is known to induce two types of topological phase transitions: one is the customary band topology transition between gapped phases, while the other is a Lifshitz transition related to the Fermi surface topology and leading to a gapless superconducting phase. We investigate the behavior of the electron density ρ and the compressibility κ across the two types of transitions, as a function of the model parameters. We find that the behavior of

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Arakawa, Yuki, and Yuto Arai. "Photoinduced Phase Transitions of Imine-Based Liquid Crystal Dimers with Twist–Bend Nematic Phases." Materials 17, no. 13 (2024): 3278. http://dx.doi.org/10.3390/ma17133278.

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Photoisomerizable molecules in liquid crystals (LCs) allow for photoinduced phase transitions, facilitating applications in a wide variety of photoresponsive materials. In contrast to the widely investigated azobenzene structure, research on the photoinduced phase-transition behavior of imine-based LCs is considerably limited. We herein report the thermal and photoinduced phase-transition behaviors of photoisomerizable imine-based LC dimers with twist–bend nematic (NTB) phases. We synthesize two homologous series of ester- and thioether-linked N-(4-cyanobenzylidene)aniline-based bent-shaped LC

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33

Comodi, Paola, Francesco Guidoni, Sabrina Nazzareni, et al. "A high-pressure phase transition in chalcostibite, CuSbS2." European Journal of Mineralogy 30, no. 3 (2018): 491–505. http://dx.doi.org/10.1127/ejm/2018/0030-2728.

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34

Yurov, V. M., S. A. Guchenko, V. Ch Laurinas, and O. N. Zavatskaya. "Structural phase transition in surface layer of metals." Bulletin of the Karaganda University. "Physics" Series 93, no. 1 (2019): 50–60. http://dx.doi.org/10.31489/2019ph1/50-60.

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Nikolaev, P. N. "Phase transition face-centered cubic crystal — homogeneous phase in helium." Seriya 3: Fizika, Astronomiya, no. 2_2024 (May 2, 2024): 2420102–1. http://dx.doi.org/10.55959/msu0579-9392.79.2420102.

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In this work, the characteristics of the phase transition face-centered cubic crystal — homogeneous phase in helium are calculated based on the correlation cell-cluster expansion. The theoretical data were compared with experimental data and good agreement was obtained. It is discussed the use of data on phase transitions in helium to estimate thermodynamic characteristics phase transition in a quantum system of hard spheres.

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Chandra, Dhanesh, Renee A. Lynch, Wei Ding, and John J. Tomlinson. "Phase Diagram Studies on Neopentylglycol and Pentaerythritol-Thermal Energy Storage Materials." Advances in X-ray Analysis 33 (1989): 445–52. http://dx.doi.org/10.1154/s037603080001987x.

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AbstractPentaerythritol (PE) and neopentylglycol (NPG) are organic molecular crystals which have hydrogen-bonded lattices with layered- and chain-type structures, respectively. The PE undergoes solid-state phase transitions at 416K, from tetragonal to a cubic (γ’) structure and NPG also undergoes this transition at 317K from a monoclinic to a cubic (γ) structure. The phase transitions in binary PE-NPG solid solutions show more than one solid-solid transition in which the NPG-rich β transforms to γ at a constant temperature but the transition of the PE-rich a phase to γ’ passes through a two-ph

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Murtazaev, A. K., and Zhavrail G. Ibaev. "The Investigation of Critical Properties of the Transition from Modulated Phase into Paramagnetic Phase." Solid State Phenomena 233-234 (July 2015): 30–33. http://dx.doi.org/10.4028/www.scientific.net/ssp.233-234.30.

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The anisotropic Ising model with competing interactions in the region of transition from a modulated phase into paramagnetic state is investigated by the Monte-Carlo methods. By means of histogram analysis and the finite-size scaling method, the modulated – paramagnetic phase transition is shown to be a second order phase transition. Critical parameters and temperatures of phase transitions in this region are calculated.

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Dixon, Charlotte A. L., Jason A. McNulty, Steven Huband, Pamela A. Thomas, and Philip Lightfoot. "Unprecedented phase transition sequence in the perovskite Li0.2Na0.8NbO3." IUCrJ 4, no. 3 (2017): 215–22. http://dx.doi.org/10.1107/s2052252517002226.

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The perovskite Li0.2Na0.8NbO3is shown, by powder neutron diffraction, to display a unique sequence of phase transitions at elevated temperature. The ambient temperature polar phase (rhombohedral, space groupR3c) transformsviaa first-order transition to a polar tetragonal phase (space groupP42mc) in the region 150–300°C; these two phases correspond to Glazer tilt systemsa−a−a−anda+a+c−, respectively. At 500°C a ferroelectric–paraelectric transition takes place fromP42mctoP42/nmc, retaining thea+a+c−tilt. Transformation to a single-tilt system,a0a0c+(space groupP4/mbm), occurs at 750°C, with the

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ALBEVERIO, SERGIO, YURI KONDRATIEV, YURI KOZITSKY, and MICHAEL RÖCKNER. "PHASE TRANSITIONS AND QUANTUM EFFECTS IN ANHARMONIC CRYSTALS." International Journal of Modern Physics B 26, no. 11 (2012): 1250063. http://dx.doi.org/10.1142/s0217979212500634.

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The most important recent results in the theory of phase transitions and quantum effects in quantum anharmonic crystals are presented and discussed. In particular, necessary and sufficient conditions for a phase transition to occur at some temperature are given in the form of simple inequalities involving the interaction strength and the parameters describing a single oscillator. The main characteristic feature of the theory is that both mentioned phenomena are described in one and the same setting, in which thermodynamic phases of the model appear as probability measures on path spaces. Then

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Liubov, Berkman, Tkachenko Olga, Turovsky Oleksandr, Fokin Vaceslav, and Strelnikov Vitaliy. "Designing a system to synchronize the input signal in a telecommunication network under the condition for reducing a transitional component of the phase error." Eastern-European Journal of Enterprise Technologies 1, no. 9(109) (2021): 66–76. https://doi.org/10.15587/1729-4061.2021.225514.

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The quality of reception, as well as the processing and demodulation of the input signal in the telecommunication systems' networks, are closely related to the quality indicators in the functioning of one of the subsystems of these networks, namely a phase synchronization system. This work has directly considered the issues related to improving the performance and reducing the transitional component of the phase error generated by transition processes in the combined synchronization system. A mathematical model has been built that makes it possible to synthesize a disrupted link in the syn

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Matsuyama, Akihiko. "Volume Phase Transitions of Heliconical Cholesteric Gels under an External Field along the Helix Axis." Gels 6, no. 4 (2020): 40. http://dx.doi.org/10.3390/gels6040040.

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We present a mean field theory to describe cholesteric elastomers and gels under an external field, such as an electric or a magnetic field, along the helix axis of a cholesteric phase. We study the deformations and volume phase transitions of cholesteric gels as a function of the external field and temperature. Our theory predicts the phase transitions between isotropic (I), nematic (N), and heliconical cholesteric (ChH) phases and the deformations of the elastomers at these phase transition temperatures. We also find volume phase transitions at the I−ChH and the N−ChH phase transitions.

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Haines, Julian, and D. F. R. Gilson. "Phase transitions in solid cycloheptene." Canadian Journal of Chemistry 68, no. 4 (1990): 604–11. http://dx.doi.org/10.1139/v90-093.

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The phase transition behaviour of cycloheptene has been investigated by differential scanning calorimetry, proton spin-lattice relaxation, and vibrational spectroscopy (infrared and Raman). Two solid–solid phase transitions were observed, at 154 and 210 K, with transition enthalpies and entropies of 5.28 and 0.71 kJ mol−1 and 34.3 and 3.4 JK−1, respectively. Cycloheptene melted at 217 K with an entropy of melting of 4.5 JK−1 mol−1. The bands in the vibrational spectra of the two high temperature phases were broad and featureless, characteristic of highly disordered phases. The presence of othe

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Kazama, Takuto, Minoru Maeda, Kouichi Takase, Yoshiki Takano, and Tadataka Watanabe. "Electric and Magnetic Properties of Transition-Metal Carbide Sc₃TC₄ (T=Co, Ru, Os)." Solid State Phenomena 257 (October 2016): 34–37. http://dx.doi.org/10.4028/www.scientific.net/ssp.257.34.

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We investigate electric and magnetic properties of quasi-one-dimensional transition-metal carbides Sc3TC4 (T = Co, Ru, and Os), and their mixed crystals Sc3(Co1-xRux)C4 and Sc3(Ru1-xOsx)C4. Sc3CoC4 exhibits successive phase transitions of charge-density-wave transition at TCDW ~ 140 K, Peierls-like structural transition at Ts ~ 70 K, and superconducting transition at Tc ~ 5 K. Sc3RuC4 and Sc3OsC4 exhibit a phase transition at T* ~ 220 K and 250 K, respectively, which should occur in the low-dimensional electronic structure. For Sc3CoC4, it is revealed by the investigation of the electric and m

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Zienert, Tilo, and Christos Georgios Aneziris. "Thermal Expansion and Phase Transformation up to 1200 °C of Metastable Aluminas Produced by Flame Spraying." Crystals 13, no. 5 (2023): 743. http://dx.doi.org/10.3390/cryst13050743.

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The transition aluminas δ1 and the cubic, non-spinel-type η-Al2O3 were detected in addition to α-Al2O3 in flame-sprayed material. Their transitions from room temperature up to 1200 °C were investigated by high-temperature XRD measurements. Structural changes with time and temperature were observed for all transition aluminas (η-, δ1- and θ-Al2O3). The phases followed the expected transition sequence of η→δ1→θ→α and showed mainly linear, temperature-independent transition rates. Based on the determined thermal expansion of the phases, it is proposed that the metastable transitions are at least

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Barni, Giulio, Simone Blasi, and Miguel Vanvlasselaer. "The hydrodynamics of inverse phase transitions." Journal of Cosmology and Astroparticle Physics 2024, no. 10 (2024): 042. http://dx.doi.org/10.1088/1475-7516/2024/10/042.

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Abstract First order phase transitions are violent phenomena that occur when the state of the universe evolves abruptly from one vacuum to another. A direct phase transition connects a local vacuum to a deeper vacuum of the zero-temperature potential, and the energy difference between the two minima manifests itself in the acceleration of the bubble wall. In this sense, the transition is triggered by the release of vacuum energy. On the other hand, an inverse phase transition connects a deeper minimum of the zero-temperature potential to a higher one, and the bubble actually expands against th

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Gagor, Anna, Maciej Wojtaś, Adam Pietraszko, and Ryszard Jakubas. "From six- to five-coordinated SbIII in [(CH3)3PH]3[Sb2Cl9]: transition pathways from single-crystal X-ray diffraction." Acta Crystallographica Section B Structural Science 64, no. 5 (2008): 558–66. http://dx.doi.org/10.1107/s0108768108027353.

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[(CH3)3PH]3[Sb2Cl9] experiences four phase transitions which were found by means of calorimetry, thermogravimetry and X-ray diffraction. The crystal structure was solved in the space group P63/mmc at 382 K (phase I), Pnam at 295 K (phase II) and Pna21 at 175 K (phase V). We observed an unusual increase in symmetry from the monoclinic to the orthorhombic form at the IV\rightarrowV transition. The parent hexagonal high-temperature phase I consists of highly disordered [(CH3)3PH]+ cations and [Sb2Cl9]3− anions with an octahedral environment of SbIII. The transition from phases I to II is associat

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Zhu, Jing-Min. "Quantum phase transitions in composite matrix product states of one-dimensional spin-1/2 chains." International Journal of Modern Physics B 29, no. 09 (2015): 1550071. http://dx.doi.org/10.1142/s021797921550071x.

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For matrix product states of one-dimensional spin-1/2 chains, we investigate the properties of quantum phase transition of the proposed composite system. We find that the system has three different ferromagnetic phases, one line of the two ferromagnetic phases coexisting equally describes the paramagnetic state, and the other two lines of two ferromagnetic phases coexisting equally describe the ferrimagnetic states, while the three phases coexisting equally point describes the ferromagnetic state. Whether on phase transition lines or at the phase transition point, the system is always in an is

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PHAT, TRAN HUU, NGUYEN TUAN ANH, and PHUNG THI THU HA. "PHASE TRANSITION PATTERNS OF NUCLEAR MATTER BASED ON EXTENDED LINEAR SIGMA MODEL." International Journal of Modern Physics E 22, no. 11 (2013): 1350077. http://dx.doi.org/10.1142/s0218301313500778.

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We study systematically various types of phase transitions in nuclear matter at finite temperature T and baryon chemical potential μ based on the extended linear sigma model with nucleon degrees of freedom. It is shown that there are three types of phase transitions in nuclear matter: the chiral symmetry nonrestoration (SNR) at high temperature, the well-known liquid–gas (LG) phase transition at sub-saturation density and the Lifshitz phase transition (LPT) from the fully-gapped state to the state with Fermi surface. Their phase diagrams are established in the (T, μ)-plane and their physical p

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Alert, Ricard, Pietro Tierno, and Jaume Casademunt. "Mixed-order phase transition in a colloidal crystal." Proceedings of the National Academy of Sciences 114, no. 49 (2017): 12906–9. http://dx.doi.org/10.1073/pnas.1712584114.

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Mixed-order phase transitions display a discontinuity in the order parameter like first-order transitions yet feature critical behavior like second-order transitions. Such transitions have been predicted for a broad range of equilibrium and nonequilibrium systems, but their experimental observation has remained elusive. Here, we analytically predict and experimentally realize a mixed-order equilibrium phase transition. Specifically, a discontinuous solid–solid transition in a 2D crystal of paramagnetic colloidal particles is induced by a magnetic field H. At the transition field Hs, the energy

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Kong, Xiangru, Wei Luo, Linyang Li, Mina Yoon, Tom Berlijn, and Liangbo Liang. "Floquet band engineering and topological phase transitions in 1T’ transition metal dichalcogenides." 2D Materials 9, no. 2 (2022): 025005. http://dx.doi.org/10.1088/2053-1583/ac4957.

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Abstract Using ab initio tight-binding approaches, we investigate Floquet band engineering of the 1T’ phase of transition metal dichalcogenides (MX2, M = W, Mo and X = Te, Se, S) monolayers under the irradiation with circularly polarized light. Our first principles calculations demonstrate that light can induce important transitions in the topological phases of this emerging materials family. For example, upon irradiation, Te-based MX2 undergoes a phase transition from quantum spin Hall (QSH) semimetal to time-reversal symmetry broken QSH insulator with a nontrivial band gap of up to 92.5 meV.

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