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Journal articles on the topic 'Correlated electron gas'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Saarela, M., T. Taipaleenm ki, and F. V. Kusmartsev. "Charged clusters in strongly correlated electron gas." Journal of Physics A: Mathematical and General 36, no. 35 (2003): 9223–36. http://dx.doi.org/10.1088/0305-4470/36/35/309.

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2

Thakur, J. S., and D. Neilson. "Superconductivity in a correlated disordered two-dimensional electron gas." Physical Review B 58, no. 20 (1998): 13717–20. http://dx.doi.org/10.1103/physrevb.58.13717.

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3

Zverev, M. V., V. A. Khodel, and S. S. Pankratov. "Microscopic theory of a strongly correlated two-dimensional electron gas." JETP Letters 96, no. 3 (2012): 192–202. http://dx.doi.org/10.1134/s0021364012150131.

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4

MACDONALD, A. H. "CORRELATIONS WEAK AND STRONG: DIVERS GUISES OF THE TWO-DIMENSIONAL ELECTRON GAS." International Journal of Modern Physics B 13, no. 05n06 (1999): 447–59. http://dx.doi.org/10.1142/s0217979299000345.

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The three-dimensional electron-gas model has been a major focus for many-body theory applied to the electronic properties of metals and semiconductors. Because the model neglects band effects, whereas electronic systems are generally more strongly correlated in narrow band systems, it is most widely used to describe the qualitative physics of weakly correlated metals with unambiguous Fermi liquid properties. The model is more interesting in two space dimensions because it provides a quantitative description of electrons in quantum wells and because these can form strongly correlated many-parti

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5

Heinzel, T., R. Jäggi, E. Ribeiro, et al. "Transport signatures of correlated disorder in a two-dimensional electron gas." Europhysics Letters (EPL) 61, no. 5 (2003): 674–80. http://dx.doi.org/10.1209/epl/i2003-00129-8.

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6

Barbaro, M. B., A. De Pace, T. W. Donnelly, and A. Molinari. "Parity-violating electron scattering from the pion-correlated relativistic Fermi gas." Nuclear Physics A 569, no. 4 (1994): 701–31. http://dx.doi.org/10.1016/0375-9474(94)90381-6.

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7

Lederer, Pascal, and J. P. Rodriguez. "de Haas–van Alphen effect in a strongly correlated electron gas." Physical Review B 46, no. 2 (1992): 1220–23. http://dx.doi.org/10.1103/physrevb.46.1220.

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8

Ioffe, L. B., D. Lidsky, and B. L. Altshuler. "Effective lowering of dimensionality in the strongly correlated two dimensional electron gas." Physical Review Letters 73, no. 3 (1994): 472–75. http://dx.doi.org/10.1103/physrevlett.73.472.

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9

Continentino, M. A. "Scaling Theory of the Metal-Insulator Transition in the Highly Correlated Electron Gas." Europhysics Letters (EPL) 9, no. 1 (1989): 77–82. http://dx.doi.org/10.1209/0295-5075/9/1/014.

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10

Buks, E., M. Heiblum, and Hadas Shtrikman. "Correlated charged donors and strong mobility enhancement in a two-dimensional electron gas." Physical Review B 49, no. 20 (1994): 14790–93. http://dx.doi.org/10.1103/physrevb.49.14790.

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11

Kwong, N. H., and M. Bonitz. "Real-Time Kadanoff-Baym Approach to Plasma Oscillations in a Correlated Electron Gas." Physical Review Letters 84, no. 8 (2000): 1768–71. http://dx.doi.org/10.1103/physrevlett.84.1768.

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12

Schlottmann, P. "Exact Results for Highly Correlated Electron Systems in One Dimension." International Journal of Modern Physics B 11, no. 04n05 (1997): 355–667. http://dx.doi.org/10.1142/s0217979297000368.

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One-dimensional conductors are a long-standing topic of research with direct applications to organic conductors and mesoscopic rings. The discovery of the ceramic high-temperature superconductors has revitalized the interest in low-dimensional charge and spin fluctuations of highly correlated electron systems. Several mechanisms proposed to explain the high-T c superconductors invoke properties of the two-dimensional Hubbard model, but probably also some one-dimensional aspects are relevant. Numerous one-dimensional models for correlated electrons have been studied with various approximate, as

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13

Gold, A., and L. Calmels. "Spin-susceptibility and spin-density excitations in the correlated quasi-one-dimensional electron gas." Physica E: Low-dimensional Systems and Nanostructures 2, no. 1-4 (1998): 426–30. http://dx.doi.org/10.1016/s1386-9477(98)00088-5.

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14

Johnson, Neil F., and Luis Quiroga. "Microscopic analytical theory of a correlated, two-dimensionalN-electron gas in a magnetic field." Journal of Physics: Condensed Matter 9, no. 27 (1997): 5889–920. http://dx.doi.org/10.1088/0953-8984/9/27/018.

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15

Rodriguez, J. P., and Pascal Lederer. "De Haas-Van Alphen and Shubnikov-De Haas Oscillations in Strongly Correlated Electron Gas." International Journal of Modern Physics B 06, no. 05n06 (1992): 497–507. http://dx.doi.org/10.1142/s0217979292000281.

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We investigate the de Haas van Alphen (dHvA) and Shubnikov-de Haas (SdH) oscillations in a 2D strongly correlated electron system. The normal state is described by the fluxless phase (uniform RVB) of the t−J model. In the quantum limit, we find that conventional 2D dHvA sawtooth behavior is unattainable: in the limit near half-filling, where the magnetic energy dominates, one has square wave dHvA behavior with reduced amplitude; far from half-filling one finds a mixed square wave-sawtooth regime. The dHvA oscillation frequency is unchanged in all regimes, and it corresponds to Luttinger’s Ferm

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16

Buks, E., M. Heiblum, Y. Levinson, and H. Shtrikman. "Scattering of a two-dimensional electron gas by a correlated system of ionized donors." Semiconductor Science and Technology 9, no. 11 (1994): 2031–41. http://dx.doi.org/10.1088/0268-1242/9/11/001.

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17

Кулик, Л. В., А. В. Горбунов, А. С. Журавлев, В. Б. Тимофеев та И. В. Кукушкин. "Двумерные триплетные магнитоэкситоны и магнетофермионный конденсат в GaAs/AlGaAs гетероструктурах". Физика твердого тела 60, № 8 (2018): 1597. http://dx.doi.org/10.21883/ftt.2018.08.46255.01gr.

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AbstractA fundamentally new collective state, namely, the magnetofermionic condensate, is discovered during photoexcitation of a sufficiently dense gas of long-lived triplet cyclotron magnetoexcitons in a twodimensional Hall insulator with a high electron mobility, a filling factor of ν = 2, and temperatures of T < 1 K. The condensed phase coherently interacts with an external electromagnetic field, exhibits superradiant properties in the recombination of correlated condensate electrons with heavy holes in the valence band, and spreads nondissipatively in the layer of a two-dimensional elec

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18

Jones, R. S., and S. B. Trickey. "Correlated wavefunctions for crystalline solids. II. The metal-insulator transition in the cubic electron gas." Journal of Physics C: Solid State Physics 18, no. 34 (1985): 6355–68. http://dx.doi.org/10.1088/0022-3719/18/34/007.

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19

Jones, R. S., and S. B. Trickey. "Correlated wavefunctions for crystalline solids: II. The metal-insulator transition in the cubic electron gas." Journal of Physics C: Solid State Physics 21, no. 18 (1988): 3475. http://dx.doi.org/10.1088/0022-3719/21/18/512.

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20

Clikeman, Tyler T., Eric V. Bukovsky, Igor V. Kuvychko, et al. "Poly(trifluoromethyl)azulenes: structures and acceptor properties." Chem. Commun. 50, no. 47 (2014): 6263–66. http://dx.doi.org/10.1039/c4cc00510d.

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A family of highly trifluoromethylated azulenes prepared in a single-step high-temperature gas-phase reaction of azulene with CF<sub>3</sub>I exhibit outstanding electron accepting properties in the gas-phase and in solution that are linearly correlated with the number of CF<sub>3</sub> groups.

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21

Monarkha, Yu P. "Magnetooscillations of temperature and microwave absorption in a highly correlated 2D electron gas on liquid helium." Low Temperature Physics 47, no. 4 (2021): 269–81. http://dx.doi.org/10.1063/10.0003737.

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22

Yim, Chi Ming, Dibyashree Chakraborti, Luke C. Rhodes, Seunghyun Khim, Andrew P. Mackenzie, and Peter Wahl. "Quasiparticle interference and quantum confinement in a correlated Rashba spin-split 2D electron liquid." Science Advances 7, no. 15 (2021): eabd7361. http://dx.doi.org/10.1126/sciadv.abd7361.

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Exploiting inversion symmetry breaking (ISB) in systems with strong spin-orbit coupling promises control of spin through electric fields—crucial to achieve miniaturization in spintronic devices. Delivering on this promise requires a two-dimensional electron gas with a spin precession length shorter than the spin coherence length and a large spin splitting so that spin manipulation can be achieved over length scales of nanometers. Recently, the transition metal oxide terminations of delafossite oxides were found to exhibit a large Rashba spin splitting dominated by ISB. In this limit, the Fermi

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23

Schreiber, Katherine A., and Gábor A. Csáthy. "Competition of Pairing and Nematicity in the Two-Dimensional Electron Gas." Annual Review of Condensed Matter Physics 11, no. 1 (2020): 17–35. http://dx.doi.org/10.1146/annurev-conmatphys-031119-050550.

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Due to its extremely rich phase diagram, the two-dimensional electron gas exposed to perpendicular magnetic fields has been the subject of intense and sustained study. One particularly interesting problem in this system is that of the half-filled Landau level, where the Fermi sea of composite fermions, a fractional quantum Hall state arising from a pairing instability of the composite fermions, and the quantum Hall nematic were observed in the half-filled N = 0, N = 1, and N ≥ 2 Landau levels, respectively. Thus, different ground states developed in different half-filled Landau levels. This si

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24

McMullen, T., P. Jena, and S. N. Khanna. "Screening of a Positive Muon by a Semion Gas." International Journal of Modern Physics B 05, no. 10 (1991): 1579–88. http://dx.doi.org/10.1142/s0217979291001486.

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μSR is one of the experimental techniques used to search for manifestations of the broken [Formula: see text] and [Formula: see text] symmetries predicted by some theories of highly correlated electron systems. When [Formula: see text] and [Formula: see text] are broken, the screening of the positively charged muon by the electron system generates a magnetic field in addition to any intrinsic magnetic field that may be present. We estimate the magnetic field that is induced at a muon site when the muon is screened by the fractional statistics gas. The value depends on the distance between the

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25

Tanner, Dennis D., Natasha Deonarian, and Abdelmajid Kharrat. "Electron affinities and Marcus reorganization energies. A correlation between gas phase electron affinities and solution phase redox potentials." Canadian Journal of Chemistry 67, no. 1 (1989): 171–75. http://dx.doi.org/10.1139/v89-028.

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Redox potentials determined by cyclic voltammetry were used in conjunction with published electron affinities to determine the solvation energies for series of three classes of compounds: substituted benzoquinones, substituted nitrobenzenes, and polynuclear aromatic hydrocarbons. Excellent linear correlations were obtained between the measured electron affinities and the E0 of the substrates. The calculated electron affinities, EA (E0), were computed using the average solvation energies for the three classes of compounds, and were found to be in excellent agreement with the measured values. Th

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26

STROCOV, V. N., P. O. NILSSON, R. CLAESSEN, et al. "SELF-ENERGY EFFECTS IN THE UNOCCUPIED AND OCCUPIED ELECTRONIC STRUCTURE OF Cu." Surface Review and Letters 09, no. 02 (2002): 1281–85. http://dx.doi.org/10.1142/s0218625x02003706.

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We report on self-energy effects in the electronic structure of Cu as a prototype weakly correlated system containing electron states of different localization. The unoccupied and occupied excited states were mapped fully resolved in the three-dimensional k using very-low-energy electron diffraction and photoemission, respectively. The self-energy corrections to the density-functional theory show distinct band- and k-dependence. These results are well described by quasiparticle GW calculations, especially for less localized states. We find correlation of the self-energy effects with spatial ov

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27

Ghirardini, V., S. Ettori, D. Eckert, and S. Molendi. "Polytropic state of the intracluster medium in the X-COP cluster sample." Astronomy & Astrophysics 627 (June 25, 2019): A19. http://dx.doi.org/10.1051/0004-6361/201834875.

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Aims. In this work, we have investigated the relation between the radially resolved thermodynamic quantities of the intracluster medium in the X-COP cluster sample, aiming to assess the stratification properties of the ICM. Methods. We modeled the relations between radius, gas temperature, density, and pressure using a combination of power-laws, also evaluating the intrinsic scatter in these relations. Results. We show that the gas pressure is remarkably well correlated to the density, with very small scatter. Also the temperature correlates with gas density with similar scatter. The slopes of

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28

NAJAFI, MEYSAM, MOHAMMAD NAJAFI, and HOUSHANG NAJAFI. "THEORETICAL STUDY OF THE SUBSTITUENT EFFECTS ON THE REACTION ENTHALPIES OF THE ANTIOXIDANT MECHANISMS OF STOBADINE DERIVATIVES IN THE GAS-PHASE AND WATER." Journal of Theoretical and Computational Chemistry 12, no. 02 (2013): 1250116. http://dx.doi.org/10.1142/s0219633612501167.

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In this paper the reaction enthalpies of three antioxidant action mechanisms, HAT, SET–PT, and SPLET, for mono-substituted Stobadines were calculated in gas-phase and water. Results show that electron-withdrawing substituents increase the bond dissociation enthalpy (BDE), ionization potential (IP), and electron transfer enthalpy (ETE), while electron-donating ones cause a rise in the proton dissociation enthalpy (PDE) and proton affinity (PA). In comparison to gas-phase, water attenuates the substituent effect on all reaction enthalpies. Results show that IP and BDE values can be successfully

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29

Roy, Chinmay, Aparna Ghosh, and Suman Chatterjee. "Role of defects in electron band structure and gas sensor response of La2CuO4." Sensor Review 40, no. 6 (2020): 675–85. http://dx.doi.org/10.1108/sr-12-2019-0319.

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Purpose This paper aims to estimate the relationship between defect structure with gas concentration for use as a gas sensor. The change in defect concentration caused a shift in the Fermi level, which in turn changed the surface potential, which is manifested as the potentiometric response of the sensing element. Design/methodology/approach A new theoretical concept based on defect chemistry and band structure was used to explain the experimental gas response of a sensor. The theoretically simulated response was compared with experimental results. Findings Understanding the origin of potentio

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30

Cliffe, Matthew, Wei Wan, Xiaodong Zou, François-Xavier Coudert, and Andrew Goodwin. "Correlated defects in group 4 metal-organic frameworks." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1124. http://dx.doi.org/10.1107/s2053273314088755.

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The importance of defects for inorganic functional framework materials is well established, being crucial for properties from relaxor ferroelectricity to superconductivity. The corresponding study of defects in metal-organic frameworks (MOFs) is still however in its infancy. Recent studies have established that ligand-absence defects can be controllably introduced into frameworks and that these defects can drastically improve the material properties, but have so far shown no evidence of correlation between defects. Much of this research has focussed on UiO-66, a zirconium dicarboxylate MOF tha

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31

Najafi, Meysam, Mohammad Najafi, and Houshang Najafi. "DFT/B3LYP Study of the Substituent Effects on the Reaction Enthalpies of the Antioxidant Mechanisms of Sesamol Derivatives in the Gas phase and water." Canadian Journal of Chemistry 90, no. 10 (2012): 915–26. http://dx.doi.org/10.1139/v2012-087.

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In this paper, the study of various ortho and meta–substituted Sesamol derivatives is presented. The reaction enthalpies related to three antioxidant action mechanisms HAT, SET–PT, and SPLET for substituted Sesamols, have been calculated using the DFT/B3LYP method in gas phase and water. Calculated results show that electron-withdrawing substituents increase the bond dissociation enthalpy (BDE), ionization potential (IP), and electron transfer enthalpy (ETE), while electron-donating ones cause a rise in the proton dissociation enthalpy (PDE) and proton affinity (PA). In the ortho position, sub

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32

Abdul Hamid, Haslinda, and M. N. Abdul Hadi. "The Study of Al-N Codoped ZnO Thin Films Prepared by DC Magnetron Sputtering." Applied Mechanics and Materials 754-755 (April 2015): 591–94. http://dx.doi.org/10.4028/www.scientific.net/amm.754-755.591.

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The codoped ZnO thin film were deposited by DC magnetron sputtering on silicon (111) followed by annealing treatment at 200 °C and 600 °C for 1 hour in nitrogen and oxygen gas mixture. Structural investigation was carried out by scanning electron microscopy (SEM), atomic force microscopy and x-ray diffraction (XRD). Film roughness and grain shape were found to be correlated with the annealing temperatures.

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33

Ma, Yuanzhen, Meng Wang, Ruying Ma, Jiamin Li, Asiya Bake, and Yadi Shan. "Micropore Characteristics and Gas-Bearing Characteristics of Marine-Continental Transitional Shale Reservoirs in the East Margin of Ordos Basin." Adsorption Science & Technology 2021 (May 22, 2021): 1–15. http://dx.doi.org/10.1155/2021/5593245.

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In order to deeply study the exploration potential of Carboniferous-Permian marine-continental transitional shale reservoirs in the Ordos Basin, the shale samples from well Y1 in the central-southern part of the Hedong Coalfield were used as the research object. The organic geochemical test, scanning electron microscope, X-ray diffraction, and high pressure mercury injection and low-temperature nitrogen adsorption experiments have studied the microscopic characteristics and gas content characteristics of shale reservoirs. The results show that the organic matter type of the sample is type III;

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34

Gyani, Angeli K., Phillip McClusky, David S. Urch, M. Charbonnicr, F. Gaillard, and M. Romand. "Non-Destructive Chemical-State Analysis of Thin Films and Surface Layers (1-1000 nm) by Low-Energy Electron-Induced X-ray Spectroscopy (LEEIXS)." Advances in X-ray Analysis 33 (1989): 247–59. http://dx.doi.org/10.1154/s0376030800019649.

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AbstractThe penetration depth of 1-12 keV electrons in most materials is less than one micron and the characteristic soft x-rays that are produced can be used to identify the elements present in the surface. Varying the energy of the incident electron beam enables the depth of analysis to be controlled.Soft x-rays often exhibit large 'chemical effects' (changes in peak profile and peak position) which can he correlated with chemical changes. A study of such effects for each element present in the sample surface, as a function of electron-beam energy, can in some cases, permit changes in the ch

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35

Tsai, Cheng-Cheng, Yu-Wei Lu, and Wei-Ping Hu. "Theoretical Prediction on the New Types of Noble Gas Containing Anions OBONgO− and OCNNgO− (Ng=He, Ar, Kr and Xe)." Molecules 25, no. 24 (2020): 5839. http://dx.doi.org/10.3390/molecules25245839.

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The fluorine-less noble gas containing anions OBONgO− and OCNNgO− have been studied by correlated electronic structure calculation and density functional theory. The obtained energetics indicates that for Ng=Kr and Xe, these anions should be kinetically stable at low temperature. The molecular structures and electron density distribution suggests that these anions are stabilized by ion-induced dipole interactions with charges concentrated on the electronegative OBO and OCN groups. The current study shows that in addition to the fluoride ion, polyatomic groups with strong electronic affinities

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36

Hadisaputra, Saprizal, Harno Dwi Pranowo, and Ria Armunanto. "EXTRACTION OF STRONTIUM(II) BY CROWN ETHER: INSIGHTS FROM DENSITY FUNCTIONAL CALCULATION." Indonesian Journal of Chemistry 12, no. 3 (2012): 207–16. http://dx.doi.org/10.22146/ijc.21332.

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The structures, energetic and thermodynamic parameters of crown ethers with different cavity size, electron donating/withdrawing substituent groups and donor atoms have been determined with density functional method at B3LYP level of theory in gas and solvent phase. Small core quasi-relativistic effective core potentials was used together with the accompanying SDD basis set for Sr2+ and DZP basis set was used for crown ether atoms. Natural bond orbital (NBO) analysis was evaluated to characterize the distribution of electrons on the complexes. The interaction energy is well correlated with the

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37

Wei, Xiaoliang, Qian Chen, Jinchuan Zhang, et al. "Nanoscale Pore Fractal Characteristics of Permian Shale and Its Impact on Methane-Bearing Capacity: A Case Study from Southern North China Basin, Central China." Journal of Nanoscience and Nanotechnology 21, no. 1 (2021): 139–55. http://dx.doi.org/10.1166/jnn.2021.18462.

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Fractal dimension is closely related to the nanoscale pore structure of shale, and it also has an important influence on the gas content of shale. To investigate the correlation between the fractal dimension and the methane (CH4) bearing features of shale, seven Permian shale samples were analyzed with field emission scanning electron microscopy (FE-SEM), low temperature nitrogen (N2), carbon dioxide (CO2) and CH4 adsorption and on-site gas desorption experiments. Based on the N2 adsorption and desorption data, we proposed a new method to better determine the gas adsorption stage at different

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38

Elafandi, Salah, Zabihollah Ahmadi, Nurul Azam, and Masoud Mahjouri-Samani. "Gas-Phase Formation of Highly Luminescent 2D GaSe Nanoparticle Ensembles in a Nonequilibrium Laser Ablation Process." Nanomaterials 10, no. 5 (2020): 908. http://dx.doi.org/10.3390/nano10050908.

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Interest in layered two-dimensional (2D) materials has been escalating rapidly over the past few decades due to their promising optoelectronic and photonic properties emerging from their atomically thin 2D structural confinements. When these 2D materials are further confined in lateral dimensions toward zero-dimensional (0D) structures, 2D nanoparticles and quantum dots with new properties can be formed. Here, we report a nonequilibrium gas-phase synthesis method for the stoichiometric formation of gallium selenide (GaSe) nanoparticles ensembles that can potentially serve as quantum dots. We s

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39

Nakahara, Sumio, S. C. Langford, and J. T. Dickinson. "Chemisorptive electron emission and atomic force microscopy as probes of plastic deformation during fracture at a metal/glass interface." Journal of Materials Research 10, no. 8 (1995): 2033–41. http://dx.doi.org/10.1557/jmr.1995.2033.

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We examine the use of chemisorptive emission (electron emission accompanying the adsorption of a reactive gas on a metal surface) and atomic force microscopy as measures of plastic deformation during fracture along a metallic Mg/glass interface. Localized ductile deformation in the metallic phase enhances the fracture energy, exposes metallic Mg to the reactive O2 atmosphere, and produces intense emissions. The number of electrons emitted following fracture in low-pressure oxygen atmospheres is strongly correlated with the total energy expended during failure (peel energy). The presence of loc

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40

Tehniat, Saba, Shazia Bashir, Khaliq Mahmood, and Ayesha Sharif. "Surface morphology correlated with sputtering yield measurements of laser-ablated iron." Laser and Particle Beams 36, no. 3 (2018): 427–41. http://dx.doi.org/10.1017/s0263034618000435.

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AbstractIron (Fe) targets are exposed to 100 pulses of Nd: YAG laser (532 nm, 6 ns, 10 Hz) at various fluences ranging from 4.8 to 38.5 J/cm2. In order to explore the effect of background environment, targets have been exposed under vacuum as well as under five different pressures ranging from 5 to 100 Torr of various background gases like Ar, Ne, O2, and air. The sputtering yield measurements and surface modifications of laser-ablated Fe are explored by quartz crystal microbalance (QCM) and scanning electron microscopy (SEM) analysis, respectively. QCM measurements reveal that the sputtering

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41

Hamid, Haslinda Abdul, Hooi Min Yee, and Mohd Nasir Abdul Hadi. "The Fabrication of Codoped ZnO Thin Films by DC Magnetron Sputtering." Key Engineering Materials 594-595 (December 2013): 958–61. http://dx.doi.org/10.4028/www.scientific.net/kem.594-595.958.

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The codoped ZnO thin film were deposited by DC magnetron sputtering on silicon (111) followed by annealing treatment at 400 °C and 600 °C for 1 hour in nitrogen and oxygen gas mixture. Structural investigation was carried out by scanning electron microscopy (SEM) and X ray diffraction (XRD). Film roughness (r.m.s) and grain shape were found to be correlated with the annealing temperatures. SEM result has shown that its surface characteristics are strongly influenced by annealing temperatures.

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42

Wu, Hao, Youliang Ji, Ruie Liu, Chunlin Zhang, and Sheng Chen. "Pore structure and fractal characteristics of a tight gas sandstone: A case study of Sulige area in the Ordos Basin, China." Energy Exploration & Exploitation 36, no. 6 (2018): 1438–60. http://dx.doi.org/10.1177/0144598718764750.

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To understand the pore structure and fractal characteristics of tight gas reservoirs, thin sections, nuclear magnetic resonance, rate-controlled mercury injection, microcomputed tomography scanning, and field emission scanning electron microscopy investigations under laboratory conditions were conducted on a suite of core samples from the Middle Permian Shihezi Formation of Sulige area in the Ordos Basin, China. The investigated tight gas sandstones comprise three types of pores, i.e. residual intergranular pore, secondary dissolution pore, and micropore. The pore–throat size distribution is e

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43

Sugiyama, Haruki, and Hidehiro Uekusa. "Two-step crystal–crystal phase transformation of N-salicylidene-p-aminobenzoic acid by gas–solid reaction with aqua–ammonia vapour." Acta Crystallographica Section C Structural Chemistry 77, no. 1 (2021): 56–60. http://dx.doi.org/10.1107/s2053229620016411.

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Crystal–crystal phase transformation by external stimuli has attracted significant attention for application in switchable materials, which can change their structures and properties. Herein, it is revealed that N-salicylidene-p-aminobenzoic acid crystals undergo a two-step crystal–crystal phase transformation through a gas–solid reaction with aqua–ammonia vapour. The photochromic behaviour of the crystals switched from nonphotochromic to photochromic and back to nonphotochromic via a phase transformation. The two-step phase transformation and photochromic behaviour change were characterized a

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Moustakidis, Ch C., and S. E. Massen. "Dependence of Information Entropy of Uniform Fermi Systems on Correlations and Thermal Effects." HNPS Proceedings 13 (February 20, 2020): 173. http://dx.doi.org/10.12681/hnps.2968.

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The influence of correlations of uniform Fermi systems (nuclear matter, electron gas and liquid 3He) on Shannon's information entropy, S, is studied. It is found that, for three different Fermi systems with different particle interactions, the correlated part of S (Soor) depends on the correlation parameter of the systems or on the discontinuity gap of the momentum distribution through two parameter expressions. The values of the parameters characterize the strength of the correlations. A two parameter expression also holds between Scor and the mean kinetic energy (K) of the Fermi system. The

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Sungthong, A., P. Khomdet, S. Porntheeraphat, C. Hruanun, Amporn Poyai, and J. Nukeaw. "Chemical Characterization and Electrical Properties of Indium Oxynitride Grown by Reactive Gas-Timing RF Magnetron Sputtering." Advanced Materials Research 93-94 (January 2010): 443–46. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.443.

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This work investigates changes in the chemical composition of InON thin films, grown by reactive gas-timing rf magnetron sputtering with different O2:N2 timing ratio characterized by Auger Electron Microscope (AES), Raman Spectroscopy which are well correlated with the electrical properties of films. The existence of nitrogen and oxygen in the deposited InON thin films was revealed by AES. Two Raman active optical phonons have been clearly observed and assigned to InN E1(TO) at ~470 cm-1 and E1(LO) at ~570 cm-1 and also shifted with different O2:N2 timing ratio. The carrier mobility of InON th

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Spies, Lothar, Walter Apel, and Bernhard Kramer. "Exact density of states of a two-dimensional electron gas in a strong magnetic field and a long-range correlated random potential." Physical Review B 55, no. 7 (1997): 4057–60. http://dx.doi.org/10.1103/physrevb.55.4057.

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Qiao, Peng, Yiwen Ju, Jianchao Cai, et al. "Micro-Nanopore Structure and Fractal Characteristics of Tight Sandstone Gas Reservoirs in the Eastern Ordos Basin, China." Journal of Nanoscience and Nanotechnology 21, no. 1 (2021): 234–45. http://dx.doi.org/10.1166/jnn.2021.18743.

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The complex pore system in tight sandstone reservoirs controls the storage and transport of natural gas. Thus, quantitatively characterizing the micro-nanopore structure of tight sandstone reservoirs is of great significance to determining the accumulation and distribution of tight gas. The pore structure of reservoirs was determined through polarizing microscopy, scanning electron microscopy (SEM), and the combination of mercury injection capillary pressure (MICP) and nuclear magnetic resonance (NMR) experiments on Late Paleozoic conventional and tight sandstone samples from the Linxing Block

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M., Vinoth Kumar, and Balasubramanian V. "Effect of current pulsing on super 304HCu weld joints." World Journal of Engineering 16, no. 6 (2019): 814–22. http://dx.doi.org/10.1108/wje-07-2019-0207.

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Purpose Super 304HCu super austenitic stainless steel tubes containing 2.3 to 3 (Wt.%) of copper (Cu) is used in superheaters and reheater tubings of nuclear power plants. In general, austenitic stainless steels welded by conventional constant current gas tungsten arc welding (CC-GTAW) produce coarse columnar grains, alloy segregation and may result in inferior mechanical properties. Pulsed current gas tungsten arc welding (PC-GTAW) can control the solidification structure by altering the prevailing thermal gradients in the weld pool. Design/methodology/approach Super 304HCu tubes of Ø 57.1 mm

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Gianoglio, Dario, Nevaf Ciftci, Sarah Armstrong, Volker Uhlenwinkel, and Livio Battezzati. "On the Cooling Rate-Microstructure Relationship in Molten Metal Gas Atomization." Metallurgical and Materials Transactions A 52, no. 9 (2021): 3750–58. http://dx.doi.org/10.1007/s11661-021-06325-2.

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AbstractGas atomization is the most used powder production technique since it provides good control on particles shape, surface oxidation and dimension. It is a rapid solidification technique involving fast cooling rates, which are strictly correlated to particle size. This relationship is typically described with a power law function that can be determined experimentally by measuring the microstructural length-scale or through the application of a heat transfer model. Both paths were exploited in the present work focusing on a gas-atomized Al-4.5Cu alloy. Atomized powders were characterized b

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Hadisaputra, Saprizal, Saprini Hamdiani, Muhammad Arsyik Kurniawan, and Nuryono Nuryono. "Influence of Macrocyclic Ring Size on the Corrosion Inhibition Efficiency of Dibenzo Crown Ether: A Density Functional Study." Indonesian Journal of Chemistry 17, no. 3 (2017): 431. http://dx.doi.org/10.22146/ijc.26667.

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The effect of macrocycle ring size on the corrosion inhibition efficiency of dibenzo-12-crown-4 (DB12C4), dibenzo-15-crown-5 (DB15C5), dibenzo-18-crown-6 (DB18C6), dibenzo-21-crown-7 (DB21C7) and dibenzo-24-crown-8 (DB24C8) have been elucidated by mean of density functional calculation at B3LYP/6-31G(d) level of theory in the gas and aqueous environment. The quantum chemical parameters including the frontier orbital energies (EHOMO, ELUMO), ionization potential (I), electron affinity (A), the absolute electronegativity (χ), hardness (η), softness (σ), and the fraction of electron transferred (

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