Log in

Relevant bibliographies by topics / Weyl Fermions / Journal articles

To see the other types of publications on this topic, follow the link: Weyl Fermions.

Journal articles on the topic 'Weyl Fermions'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Weyl Fermions.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Ma, Tian-Chi, Jing-Nan Hu, Yuan Chen, Lei Shao, Xian-Ru Hu, and Jian-Bo Deng. "Coexistence of type-II and type-IV Dirac fermions in SrAgBi." Modern Physics Letters B 35, no. 11 (2021): 2150181. http://dx.doi.org/10.1142/s0217984921501815.

Full text

Abstract:

Relativistic massless Weyl and Dirac fermions have isotropic and linear dispersion relations to maintain Poincaré symmetry, which is the most basic symmetry in high-energy physics. The situation in condensed matter physics is less constrained; only certain subgroups of Poincaré symmetry — the 230 space groups that exist in 3D lattices — need be respected. Then, the free fermionic excitations that have no high-energy analogues could exist in solid state systems. Here, We discovered a type of nonlinear Dirac fermion without high-energy analogue in SrAgBi and named it type-IV Dirac fermion. The t

APA, Harvard, Vancouver, ISO, and other styles

2

Selch, Maik, and Mikhail Zubkov. "Effective Lagrangian for the Macroscopic Motion of Weyl Fermions in 3He-A." Symmetry 17, no. 7 (2025): 1045. https://doi.org/10.3390/sym17071045.

Full text

Abstract:

We consider the macroscopic motion of the normal component of superfluid 3He-A in global thermodynamic equilibrium within the context of the Zubarev statistical operator method. We formulate the corresponding effective theory in the language of the functional integral. The effective Lagrangian comprising macroscopic motion of fermionic excitations is calculated explicitly for the emergent relativistic fermions of the superfluid 3He-A phase immersed in a non-trivial bosonic background due to a space- and time-dependent matrix-valued vierbein featuring nonzero torsion as well as the Nieh–Yan ano

APA, Harvard, Vancouver, ISO, and other styles

3

Pandey, Mahul, and Sachindeo Vaidya. "Yang–Mills matrix mechanics and quantum phases." International Journal of Geometric Methods in Modern Physics 14, no. 08 (2017): 1740009. http://dx.doi.org/10.1142/s0219887817400096.

Full text

Abstract:

The [Formula: see text] Yang–Mills matrix model coupled to fundamental fermions is studied in the adiabatic limit, and quantum critical behavior is seen at special corners of the gauge field configuration space. The quantum scalar potential for the gauge field induced by the fermions diverges at the corners, and is intimately related to points of enhanced degeneracy of the fermionic Hamiltonian. This in turn leads to superselection sectors in the Hilbert space of the gauge field, the ground states in different sectors being orthogonal to each other. The [Formula: see text] Yang–Mills matrix mo

APA, Harvard, Vancouver, ISO, and other styles

4

ALONSO, J. L., J. L. CORTÉS, and E. RIVAS. "WEYL FERMION FUNCTIONAL INTEGRAL AND TWO-DIMENSIONAL GAUGE THEORIES." International Journal of Modern Physics A 05, no. 14 (1990): 2839–51. http://dx.doi.org/10.1142/s0217751x90001331.

Full text

Abstract:

In the path integral approach we introduce a general regularization scheme for a Weyl fermionic measure. This allows us to study the functional integral formulation of a two-dimensional U(1) gauge theory with an arbitrary content of left-handed and right-handed fermions. A particular result is that, in contrast with a regularization of the fermionic measure based on a unique Dirac operator, by taking the Dirac fermionic measure as a product of two independent Weyl fermionic measures a consistent and unitary result can be obtained for the Chiral Schwinger Model (CSM) as a byproduct of the arbit

APA, Harvard, Vancouver, ISO, and other styles

5

Dey, Bashab, and Tarun Kanti Ghosh. "Dynamical polarization, optical conductivity and plasmon mode of a linear triple component fermionic system." Journal of Physics: Condensed Matter 34, no. 25 (2022): 255701. http://dx.doi.org/10.1088/1361-648x/ac638a.

Full text

Abstract:

Abstract We investigate the density and optical responses of a linear triple component fermionic system in both non-interacting and interacting regimes by computing its dynamical polarization function, random phase approximation dielectric function, plasmon mode and long wavelength optical conductivity and compare the results with those of Weyl fermions and three-dimensional free electron gas. Linear triple component fermions are pseudospin-1 generalization of Weyl fermions, consisting of two linearly dispersive bands and a flat band. The presence of flat band brings about notable modification

APA, Harvard, Vancouver, ISO, and other styles

6

Huang, Shin-Ming, Su-Yang Xu, Ilya Belopolski, et al. "New type of Weyl semimetal with quadratic double Weyl fermions." Proceedings of the National Academy of Sciences 113, no. 5 (2016): 1180–85. http://dx.doi.org/10.1073/pnas.1514581113.

Full text

Abstract:

Weyl semimetals have attracted worldwide attention due to their wide range of exotic properties predicted in theories. The experimental realization had remained elusive for a long time despite much effort. Very recently, the first Weyl semimetal has been discovered in an inversion-breaking, stoichiometric solid TaAs. So far, the TaAs class remains the only Weyl semimetal available in real materials. To facilitate the transition of Weyl semimetals from the realm of purely theoretical interest to the realm of experimental studies and device applications, it is of crucial importance to identify o

APA, Harvard, Vancouver, ISO, and other styles

7

Huang, Angus, Chin-Hsuan Chen, and Horng-Tay Jeng. "Threefold Fermions, Weyl Points, and Superconductivity in the Mirror Symmetry Lacking Semiconductor TlCd2Te4." Nanomaterials 12, no. 4 (2022): 679. http://dx.doi.org/10.3390/nano12040679.

Full text

Abstract:

The topological phase transition and exotic quasiparticles in materials have attracted much attention because of their potential in spintronics and mimic of elementary particles. Especially, great research interest has been paid to search for the Weyl fermions in solid-state physics. By using first-principles calculations, we predict that the multinary semiconductor alloy TlCd2Te4 exhibits threefold fermions and nodal-line fermions, which are protected by the S4 improper rotational symmetry. Moreover, owing to the lack of inversion and mirror symmetries, the threefold fermions split into Weyl

APA, Harvard, Vancouver, ISO, and other styles

8

Hirschberger, Max, and Yoshinori Tokura. "Weyl fermions promote collective magnetism." Nature Materials 20, no. 12 (2021): 1592–93. http://dx.doi.org/10.1038/s41563-021-01133-w.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Dai, Xi. "Weyl fermions go into orbit." Nature Physics 12, no. 8 (2016): 727–28. http://dx.doi.org/10.1038/nphys3841.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Marino, E. C. "Bosonization of free Weyl fermions." Journal of Statistical Mechanics: Theory and Experiment 2017, no. 3 (2017): 033103. http://dx.doi.org/10.1088/1742-5468/aa60cc.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Pal, Palash B. "Dirac, Majorana, and Weyl fermions." American Journal of Physics 79, no. 5 (2011): 485–98. http://dx.doi.org/10.1119/1.3549729.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Narayanan, Rajamani, and Herbert Neuberger. "Overlap for Majorana-Weyl fermions." Nuclear Physics B - Proceedings Supplements 53, no. 1-3 (1997): 658–60. http://dx.doi.org/10.1016/s0920-5632(96)00746-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Huang, Silu, Jisun Kim, W. A. Shelton, E. W. Plummer, and Rongying Jin. "Nontrivial Berry phase in magnetic BaMnSb2 semimetal." Proceedings of the National Academy of Sciences 114, no. 24 (2017): 6256–61. http://dx.doi.org/10.1073/pnas.1706657114.

Full text

Abstract:

The subject of topological materials has attracted immense attention in condensed-matter physics because they host new quantum states of matter containing Dirac, Majorana, or Weyl fermions. Although Majorana fermions can only exist on the surface of topological superconductors, Dirac and Weyl fermions can be realized in both 2D and 3D materials. The latter are semimetals with Dirac/Weyl cones either not tilted (type I) or tilted (type II). Although both Dirac and Weyl fermions have massless nature with the nontrivial Berry phase, the formation of Weyl fermions in 3D semimetals require either t

APA, Harvard, Vancouver, ISO, and other styles

14

Xu, Su-Yang, Ilya Belopolski, Daniel S. Sanchez, et al. "Experimental discovery of a topological Weyl semimetal state in TaP." Science Advances 1, no. 10 (2015): e1501092. http://dx.doi.org/10.1126/sciadv.1501092.

Full text

Abstract:

Weyl semimetals are expected to open up new horizons in physics and materials science because they provide the first realization of Weyl fermions and exhibit protected Fermi arc surface states. However, they had been found to be extremely rare in nature. Recently, a family of compounds, consisting of tantalum arsenide, tantalum phosphide (TaP), niobium arsenide, and niobium phosphide, was predicted as a Weyl semimetal candidates. We experimentally realize a Weyl semimetal state in TaP. Using photoemission spectroscopy, we directly observe the Weyl fermion cones and nodes in the bulk, and the F

APA, Harvard, Vancouver, ISO, and other styles

15

Wang, Xun-Gao, Yuan Sun, Liang Liu, and Wu-Ming Liu. "Collective modes of type-IIWeyl fermions with repulsive S-wave interaction." Chinese Physics B 31, no. 2 (2022): 026701. http://dx.doi.org/10.1088/1674-1056/ac3d81.

Full text

Abstract:

Three-dimensional type-II Weyl fermions possess overtilted cone-like low-energy band dispersion. Unlike the closed ellipsoidal Fermi surface for type-I Weyl fermions, the Fermi surface is an open hyperboloid for type-II Weyl fermions. We evaluate the spin and density susceptibility of type-II Weyl fermions with repulsive S-wave interaction by means of Green’s functions. We obtain the particle–hole continuum along the tilted momentum direction and perpendicular to the tilted momentum direction respectively. We find the zero sound mode in some repulsive interaction strengths by numerically solvi

APA, Harvard, Vancouver, ISO, and other styles

16

Bonora, Loriano, Roberto Soldati, and Stav Zalel. "Dirac, Majorana, Weyl in 4D." Universe 6, no. 8 (2020): 111. http://dx.doi.org/10.3390/universe6080111.

Full text

Abstract:

This is a review of some elementary properties of Dirac, Weyl and Majorana spinors in 4D. We focus in particular on the differences between massless Dirac and Majorana fermions, on one side, and Weyl fermions, on the other. We review in detail the definition of their effective actions, when coupled to (vector and axial) gauge fields, and revisit the corresponding anomalies using the Feynman diagram method with different regularisations. Among various well known results we stress in particular the regularisation independence in perturbative approaches, while not all the regularisations fit the

APA, Harvard, Vancouver, ISO, and other styles

17

SCHAPOSNIK, F. A., and H. VUCETICH. "QUANTIZATION OF GRAVITATION WITH WEYL FERMIONS." International Journal of Modern Physics A 02, no. 06 (1987): 1755–62. http://dx.doi.org/10.1142/s0217751x87000909.

Full text

Abstract:

It is shown that quantization of gravitation consistent with the presence of Weyl fermions is possible, in spite of the existence of Lorentz anomalies: the group of local Lorentz transformations is quantized becoming a physical field and the anomaly is absorbed.

APA, Harvard, Vancouver, ISO, and other styles

18

Huet, Patrick, Rajamani Narayanan, and Herbert Neuberger. "Overlap formulation of Majorana-Weyl fermions." Physics Letters B 380, no. 3-4 (1996): 291–95. http://dx.doi.org/10.1016/0370-2693(96)00443-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Gavazzi, Giuliano M. "Weyl‐ordered fermions and path integrals." Journal of Mathematical Physics 30, no. 12 (1989): 2904–6. http://dx.doi.org/10.1063/1.528474.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

MEHTA, MAYANIK R. "EUCLIDEANIZATION OF MAJORANA AND WEYL FERMIONS." Modern Physics Letters A 06, no. 30 (1991): 2811–17. http://dx.doi.org/10.1142/s0217732391003274.

Full text

Abstract:

A continuous procedure is presented for euclideanization of Majorana and Weyl fermions without doubling their degrees of freedom. The Euclidean theory so obtained is SO (4) invariant and Osterwalder-Schrader (OS) positive. This enables us to define a one-complex parameter family of the N=1 supersymmetric Yang-Mills (SSYM) theories which interpolate between the Minkowski and a Euclidean SSYM theory. The interpolating action, and hence the Euclidean action, manifests all the continous symmetries of the original Minkowski space theory.

APA, Harvard, Vancouver, ISO, and other styles

21

Xu, Bing, Zhenyao Fang, Miguel-Ángel Sánchez-Martínez, et al. "Optical signatures of multifold fermions in the chiral topological semimetal CoSi." Proceedings of the National Academy of Sciences 117, no. 44 (2020): 27104–10. http://dx.doi.org/10.1073/pnas.2010752117.

Full text

Abstract:

We report the optical conductivity in high-quality crystals of the chiral topological semimetal CoSi, which hosts exotic quasiparticles known as multifold fermions. We find that the optical response is separated into several distinct regions as a function of frequency, each dominated by different types of quasiparticles. The low-frequency intraband response is captured by a narrow Drude peak from a high-mobility electron pocket of double Weyl quasiparticles, and the temperature dependence of the spectral weight is consistent with its Fermi velocity. By subtracting the low-frequency sharp Drude

APA, Harvard, Vancouver, ISO, and other styles

22

Tsigaridas, Georgios N., Aristides I. Kechriniotis, Christos A. Tsonos, and Konstantinos K. Delibasis. "A Proposed Device for Controlling the Flow of Information Based on Weyl Fermions." Sensors 24, no. 11 (2024): 3361. http://dx.doi.org/10.3390/s24113361.

Full text

Abstract:

In this work we propose a novel device for controlling the flow of information using Weyl fermions. Based on a previous work by our group, we show that it is possible to fully control the flow of Weyl fermions on several different channels by applying an electric field perpendicular to the direction of motion of the particles on each channel. In this way, we can transmit information as logical bits, depending on the existence or not of a Weyl current on each channel. We also show that the response time of this device is exceptionally low, less than 1 ps, for typical values of its parameters, a

APA, Harvard, Vancouver, ISO, and other styles

23

HARADA, KOJI. "EQUIVALENCE BETWEEN THE WESS-ZUMINO-WITTEN MODEL AND TWO CHIRAL BOSONS." International Journal of Modern Physics A 06, no. 19 (1991): 3399–418. http://dx.doi.org/10.1142/s0217751x91001659.

Full text

Abstract:

We establish the formal equivalence of a bosonized Dirac fermion (the Wess-Zumino-Witten model) to two bosonized Weyl fermions (Sonnenschein’s chiral bosons) in the path integral framework. These two systems can be regarded as gauge-fixed systems of the same gauge-invariant theory. Factorization of the fermion determinant of QCD2 is naturally realized in terms of chiral bosonization, up to a contact term which is necessary for maintaining gauge invariance. Canonical quantization of the gauge-invariantly extended system is performed.

APA, Harvard, Vancouver, ISO, and other styles

24

Toyoda, S., R. Yamada, Y. Kaneko, Y. Tokura, and N. Ogawa. "Weyl fermions in SrRuO₃ detected by Brillouin light scattering." Applied Physics Letters 120, no. 24 (2022): 242408. http://dx.doi.org/10.1063/5.0096687.

Full text

Abstract:

We report an observation of Weyl fermions in momentum space in an itinerant ferromagnet SrRuO3 single crystal via inelastic optical spectroscopy. A clear magnetic resonance around 200 GHz is observed in the Brillouin light scattering spectra, which corresponds to the ferromagnetic resonance at the Γ point. The spin-wave gap shows non-monotonous temperature dependence distinct from the bulk magnetization. The observed peculiar temperature evolution in the spin-wave gap scales with that of the anomalous Hall conductivity, which is a hallmark of Weyl fermions near the Fermi energy.

APA, Harvard, Vancouver, ISO, and other styles

25

Andrianov, A. A., and Yuri Novozhilov. "Consistency of gauge theories with Weyl fermions." Physics Letters B 163, no. 1-4 (1985): 189–92. http://dx.doi.org/10.1016/0370-2693(85)90218-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Babelon, O., F. A. Schaposnik, and C. M. Viallet. "Quantization of gauge theories with Weyl fermions." Physics Letters B 177, no. 3-4 (1986): 385–88. http://dx.doi.org/10.1016/0370-2693(86)90773-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Volovik, Grigory. "Emergent physics: Fermi-point scenario." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 366, no. 1877 (2008): 2935–51. http://dx.doi.org/10.1098/rsta.2008.0070.

Full text

Abstract:

The Fermi-point scenario of emergent gravity has the following consequences: gravity emerges together with fermionic and bosonic matter; emergent fermionic matter consists of massless Weyl fermions; emergent bosonic matter consists of gauge fields; Lorentz symmetry persists well above the Planck energy; space–time is naturally four dimensional; the Universe is naturally flat; the cosmological constant is naturally small or zero; the underlying physics is based on discrete symmetries; ‘quantum gravity’ cannot be obtained by quantization of Einstein equations; and there is no contradiction betwe

APA, Harvard, Vancouver, ISO, and other styles

28

Zhang, Nan, Gan Zhao, Lin Li, et al. "Magnetotransport signatures of Weyl physics and discrete scale invariance in the elemental semiconductor tellurium." Proceedings of the National Academy of Sciences 117, no. 21 (2020): 11337–43. http://dx.doi.org/10.1073/pnas.2002913117.

Full text

Abstract:

The study of topological materials possessing nontrivial band structures enables exploitation of relativistic physics and development of a spectrum of intriguing physical phenomena. However, previous studies of Weyl physics have been limited exclusively to semimetals. Here, via systematic magnetotransport measurements, two representative topological transport signatures of Weyl physics, the negative longitudinal magnetoresistance and the planar Hall effect, are observed in the elemental semiconductor tellurium. More strikingly, logarithmically periodic oscillations in both the magnetoresistanc

APA, Harvard, Vancouver, ISO, and other styles

29

Chang, Guoqing, Su-Yang Xu, Daniel S. Sanchez, et al. "A strongly robust type II Weyl fermion semimetal state in Ta3S2." Science Advances 2, no. 6 (2016): e1600295. http://dx.doi.org/10.1126/sciadv.1600295.

Full text

Abstract:

Weyl semimetals are of great interest because they provide the first realization of the Weyl fermion, exhibit exotic quantum anomalies, and host Fermi arc surface states. The separation between Weyl nodes of opposite chirality gives a measure of the robustness of the Weyl semimetal state. To exploit the novel phenomena that arise from Weyl fermions in applications, it is crucially important to find robust separated Weyl nodes. We propose a methodology to design robust Weyl semimetals with well-separated Weyl nodes. Using this methodology as a guideline, we search among the material parameter s

APA, Harvard, Vancouver, ISO, and other styles

30

Sun, Jian-Peng, Qing Ji, Yuan Li, and Zhigang Song. "Multiple fermions in MoP." Modern Physics Letters B 33, no. 24 (2019): 1950293. http://dx.doi.org/10.1142/s0217984919502932.

Full text

Abstract:

Based on the first-principles calculation, we report that the WC-type MoP is a new type of topological semimetal. It can host Weyl semimetal phase with six pairs of Weyl points (WPs) in the first whole Brillouin zone (BZ). In the absence of spin-orbit coupling (SOC), band inversion forms a gapless nodal ring protected by horizontal mirror symmetry [Formula: see text]. The strong SOC in MoP makes the nodal ring fully gapped in the mirror plane, and generates multiple WPs away from the plane. As one hallmark of Weyl semimetals, the unique Fermi arcs are also observed by calculating the projected

APA, Harvard, Vancouver, ISO, and other styles

31

Li, Zhi, Dan-Dan Xu, Shu-Yu Ning, et al. "Predicted Weyl fermions in magnetic GdBi and GdSb." International Journal of Modern Physics B 31, no. 29 (2017): 1750217. http://dx.doi.org/10.1142/s0217979217502174.

Full text

Abstract:

Motivated by the chiral anomaly steering negative longitudinal magnetoresistance in GdBiPt under external magnetic field, we studied the electronic structures of GdBi with paramagnetism, antiferromagnetism and ferromagnetism by first-principles calculations with modified Becke and Johnson local density approximation plus Hubbard [Formula: see text]. Our calculated results reveal that paramagnetic GdBi is semiconducting, while the antiferromagnetic GdBi is a topological nontrivial compensation metal. We also predict the presence of a pair of Weyl fermions in ferromagnetic GdBi and GdSb. The ban

APA, Harvard, Vancouver, ISO, and other styles

32

Li, Chenyao, Shuo Zhang, Xinrong Zhao, et al. "Double-Weyl fermions in two-dimensional ferromagnetic materials." Journal of Alloys and Compounds 1010 (January 2025): 178059. https://doi.org/10.1016/j.jallcom.2024.178059.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Hasenfratz, Peter, and Reto von Allmen. "Towards Weyl fermions on the lattice without artefacts." Journal of High Energy Physics 2008, no. 02 (2008): 079. http://dx.doi.org/10.1088/1126-6708/2008/02/079.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Nobukane, H., A. Tokuno, T. Matsuyama, and S. Tanda. "Majorana-Weyl fermions in (2+1)-dimensional superconductors." Journal of Physics: Conference Series 400, no. 2 (2012): 022084. http://dx.doi.org/10.1088/1742-6596/400/2/022084.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Langouche, F., and H. Leutwyler. "Weyl fermions on strings embedded in three dimensions." Zeitschrift für Physik C Particles and Fields 36, no. 3 (1987): 473–78. http://dx.doi.org/10.1007/bf01573943.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Novaes, S. F., and D. Spehler. "Weyl-van der Waerden spinor technique for fermions." Nuclear Physics B 371, no. 3 (1992): 618–36. http://dx.doi.org/10.1016/0550-3213(92)90689-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Wang, Kaipu, Wujun Shi, Weizheng Cao, et al. "Weyl Fermion Manipulation Through Magnetic Transitions in the Ferromagnetic Non‐Centrosymmetric Weyl Semimetal PrAlSi." Advanced Electronic Materials, April 30, 2025. https://doi.org/10.1002/aelm.202500044.

Full text

Abstract:

AbstractPrAlSi, a non‐centrosymmetric ferromagnetic Weyl semimetal candidate with a Curie temperature of 17.8K, offers a unique platform for exploring the interplay of symmetry breaking and topological electronic structures. Up to now, the Weyl fermion distribution as well as their evolution across the ferromagnetic to paramagnetic phase transition in PrAlSi has not been explored. Here, the presence of Weyl fermions is uncovered in PrAlSi and demonstrates that they can be manipulated through the magnetic phase transition. The ab‐initio calculations indicate a shift in the momentum and energy p

APA, Harvard, Vancouver, ISO, and other styles

38

Li, Cong, Jianfeng Zhang, Yang Wang, et al. "Emergence of Weyl fermions by ferrimagnetism in a noncentrosymmetric magnetic Weyl semimetal." Nature Communications 14, no. 1 (2023). http://dx.doi.org/10.1038/s41467-023-42996-8.

Full text

Abstract:

AbstractCondensed matter physics has often provided a platform for investigating the interplay between particles and fields in cases that have not been observed in high-energy physics. Here, using angle-resolved photoemission spectroscopy, we provide an example of this by visualizing the electronic structure of a noncentrosymmetric magnetic Weyl semimetal candidate NdAlSi in both the paramagnetic and ferrimagnetic states. We observe surface Fermi arcs and bulk Weyl fermion dispersion as well as the emergence of new Weyl fermions in the ferrimagnetic state. Our results establish NdAlSi as a mag

APA, Harvard, Vancouver, ISO, and other styles

39

Abbas, Arwa Saud. "Scientific explanation of e+ and Weyl fermion for injecting semiconductor devices." Frontiers in Electronics 5 (January 14, 2025). https://doi.org/10.3389/felec.2024.1372631.

Full text

Abstract:

The scientific explanation of utilizing the positron and Weyl fermion in semiconductors is presented. In view of the slow e+ beam-generation development for imaging technology alongside the Weyl fermion which carries charge like an electron, but has no mass, thus moves much faster, injecting semiconductor devices is addressed. The information gained from this prediction has allowed the broadening of its implementation to semiconductor technology with electronic excitation using sources other than e-. Developing the positron microbeam and Weyl fermions can be described with the concept of type

APA, Harvard, Vancouver, ISO, and other styles

40

Maleknejad, Azadeh, and Joachim Kopp. "Weyl fermion creation by cosmological gravitational wave background at 1-loop." Journal of High Energy Physics 2025, no. 1 (2025). https://doi.org/10.1007/jhep01(2025)023.

Full text

Abstract:

Abstract Weyl fermions of spin $$ \frac{1}{2} $$ 1 2 minimally coupled to Einstein’s gravity in 4 dimensions cannot be produced purely gravitationally in an expanding Universe at tree level. Surprisingly, as we showed in a recent letter [1], this changes at gravitational 1-loop when cosmic perturbations, like a gravitational wave background, are present. Such a background introduces a new scale, thereby breaking the fermions’ conformal invariance. This leads to a non-vanishing gravitational self-energy for Weyl fermions at 1-loop and induces their production. In this paper, we present an exten

APA, Harvard, Vancouver, ISO, and other styles

41

Krieger, Jonas A., Samuel Stolz, Iñigo Robredo, et al. "Weyl spin-momentum locking in a chiral topological semimetal." Nature Communications 15, no. 1 (2024). http://dx.doi.org/10.1038/s41467-024-47976-0.

Full text

Abstract:

AbstractSpin-orbit coupling in noncentrosymmetric crystals leads to spin-momentum locking – a directional relationship between an electron’s spin angular momentum and its linear momentum. Isotropic orthogonal Rashba spin-momentum locking has been studied for decades, while its counterpart, isotropic parallel Weyl spin-momentum locking has remained elusive in experiments. Theory predicts that Weyl spin-momentum locking can only be realized in structurally chiral cubic crystals in the vicinity of Kramers-Weyl or multifold fermions. Here, we use spin- and angle-resolved photoemission spectroscopy

APA, Harvard, Vancouver, ISO, and other styles

42

Wu, Jiafang, Shasha Ke, Yong Guo, Huaiwu Zhang, and Haifeng Lü. "Weyl nodes and hybrid nodal loop with spin–orbit coupling in W2TeSe." Applied Physics Letters 123, no. 19 (2023). http://dx.doi.org/10.1063/5.0174989.

Full text

Abstract:

Topological metals with unique fermionic states provide an attractive research platform for exploring various topological phenomena and have aroused great research interest. In this study, we employ first-principles calculations to predict that W2TeSe, a candidate for Weyl metal, exhibits the coexistence of type-I Weyl nodes and hybrid nodal loop. These topological features are protected by symmetries and remain robust against symmetries conserving perturbations, such as spin–orbit coupling. The number, energies, and separations of these Weyl points align with expectations for ideal topologica

APA, Harvard, Vancouver, ISO, and other styles

43

Wang, C. N., D. Tay, Q. X. Dong, et al. "Weyl fermion excitations in the ideal Weyl semimetal CuTlSe2." Physical Review Research 6, no. 3 (2024). http://dx.doi.org/10.1103/physrevresearch.6.033229.

Full text

Abstract:

An ideal Weyl semimetal is characterized by a dispersion in which only Weyl cones intersect the Fermi level, with low-energy behavior being governed by Weyl fermions. Although ideal Weyl semimetals have long been anticipated, only a few are realized in nonmagnetic materials. In this study, we confirm the presence of Weyl-fermion excitations in the ideal Weyl semimetal CuTlSe2 via a combination of magnetoresistance, Hall-effect, magnetic-susceptibility, nuclear magnetic resonance (NMR), and muon-spin relaxation (µSR) experiments. Magnetoresistance measurements reveal a negative longitudinal mag

APA, Harvard, Vancouver, ISO, and other styles

44

He, Bin, Mengyu Yao, Yu Pan, et al. "Enhanced Weyl semimetal signature in Co3Sn2S2 Kagome ferromagnet by chlorine doping." Communications Materials 5, no. 1 (2024). https://doi.org/10.1038/s43246-024-00720-z.

Full text

Abstract:

AbstractWeyl fermions are chiral massless fermions with exotic properties. In the first established magnetic Weyl semimetal, Co3Sn2S2, a giant anomalous Hall effect has been observed, while its Fermi energy remaining 60 meV from the Weyl points. Shifting the Fermi energy closer to the Weyl points may assist in the identification of Weyl Fermion related transport signatures. Here we show that effective chlorine doping has resulted in a shift of the Fermi energy by 15 meV towards the Weyl points, which is confirmed by a combination of the systematic angular-resolved photoemission spectroscopy me

APA, Harvard, Vancouver, ISO, and other styles

45

Matos, Tonatiuh, Omar Gallegos, and Pierre-Henri Chavanis. "Hydrodynamic representation and energy balance for Dirac and Weyl fermions in curved space-times." European Physical Journal C 82, no. 10 (2022). http://dx.doi.org/10.1140/epjc/s10052-022-10853-5.

Full text

Abstract:

AbstractUsing a generalized Madelung transformation, we derive the hydrodynamic representation of the Dirac equation in arbitrary curved space-times coupled to an electromagnetic field. We obtain Dirac–Euler equations for fermions involving a continuity equation and a first integral of the Bernoulli equation. Comparing between the Dirac and Klein–Gordon equations we obtain the balance equation for fermion particles. We also use the correspondence between fermions and bosons to derive the hydrodynamic representation of the Weyl equation which is a chiral form of the Dirac equation.

APA, Harvard, Vancouver, ISO, and other styles

46

Takiguchi, Kosuke, Yuki K. Wakabayashi, Hiroshi Irie, et al. "Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide." Nature Communications 11, no. 1 (2020). http://dx.doi.org/10.1038/s41467-020-18646-8.

Full text

Abstract:

Abstract Magnetic Weyl semimetals have novel transport phenomena related to pairs of Weyl nodes in the band structure. Although the existence of Weyl fermions is expected in various oxides, the evidence of Weyl fermions in oxide materials remains elusive. Here we show direct quantum transport evidence of Weyl fermions in an epitaxial 4d ferromagnetic oxide SrRuO3. We employ machine-learning-assisted molecular beam epitaxy to synthesize SrRuO3 films whose quality is sufficiently high to probe their intrinsic transport properties. Experimental observation of the five transport signatures of Weyl

APA, Harvard, Vancouver, ISO, and other styles

47

"And now, Weyl fermions." Journal Club for Condensed Matter Physics, April 30, 2012. http://dx.doi.org/10.36471/jccm_april_2012_01.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Hoffmann, Felix, Martin Siebert, Antonia Duft, and Vojislav Krstić. "Fingerprints of magnetoinduced charge density waves in monolayer graphene beyond half filling." Scientific Reports 12, no. 1 (2022). http://dx.doi.org/10.1038/s41598-022-26122-0.

Full text

Abstract:

AbstractA charge density wave is a condensate of fermions, whose charge density shows a long-range periodic modulation. Such charge density wave can be principally described as a macroscopic quantum state and is known to occur by various formation mechanisms. These are the lattice deforming Peierls transition, the directional, fermionic wave vector orientation prone Fermi surface nesting or the generic charge ordering, which in contrast is associated solely with the undirected effective Coulomb interaction between fermions. In two-dimensional Dirac/Weyl-like systems, the existence of charge de

APA, Harvard, Vancouver, ISO, and other styles

49

Balduini, Federico, Alan Molinari, Lorenzo Rocchino, et al. "Intrinsic negative magnetoresistance from the chiral anomaly of multifold fermions." Nature Communications 15, no. 1 (2024). http://dx.doi.org/10.1038/s41467-024-50451-5.

Full text

Abstract:

AbstractThe chiral anomaly - a hallmark of chiral spin-1/2 Weyl fermions - is an imbalance between left- and right-moving particles that underpins phenomena such as particle decay and negative longitudinal magnetoresistance in Weyl semimetals. The discovery that chiral crystals can host higher-spin generalizations of Weyl quasiparticles without high-energy counterparts, known as multifold fermions, raises the fundamental question of whether the chiral anomaly is a more general phenomenon. Answering this question requires materials with chiral quasiparticles within a sizable energy window aroun

APA, Harvard, Vancouver, ISO, and other styles

50

Lu, Qiangsheng, P. V. Sreenivasa Reddy, Hoyeon Jeon, et al. "Realization of a two-dimensional Weyl semimetal and topological Fermi strings." Nature Communications 15, no. 1 (2024). http://dx.doi.org/10.1038/s41467-024-50329-6.

Full text

Abstract:

AbstractA two-dimensional (2D) Weyl semimetal, akin to a spinful variant of graphene, represents a topological matter characterized by Weyl fermion-like quasiparticles in low dimensions. The spinful linear band structure in two dimensions gives rise to distinctive topological properties, accompanied by the emergence of Fermi string edge states. We report the experimental realization of a 2D Weyl semimetal, bismuthene monolayer grown on SnS(Se) substrates. Using spin and angle-resolved photoemission and scanning tunneling spectroscopies, we directly observe spin-polarized Weyl cones, Weyl nodes

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!