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Type-II Weyl semimetals are characterized by the tilted linear dispersion in the low-energy excitations, mimicking Weyl fermions but with manifest violation of the Lorentz invariance, which has intriguing quantum transport properties. The…

介观与纳米尺度物理 · 物理学 2018-05-30 Yi-Wen Wei , Chao-Kai Li , Jingshan Qi , Ji Feng

The collapse of Landau levels under an electric field perpendicular to the magnetic field is one of the distinctive features of Dirac materials. So is the coupling of lattice deformations to the electronic degrees of freedom in the form of…

介观与纳米尺度物理 · 物理学 2022-08-19 Yang-Jun Lee , Cheol-Hwan Park , María A. H. Vozmediano

Hall effect of topological quantum materials often reveals essential new physics and possesses potential for application. Magnetic Weyl semimetal is one especially interesting example that hosts an interplay between the spontaneous…

介观与纳米尺度物理 · 物理学 2024-10-18 Xiao-Xiao Zhang , Naoto Nagaosa

The phenomenon of nonlinear transport has attracted tremendous interest within the condensed matter community. We present a theoretical framework for nonlinear transport based on the nonequilibrium retarded Green's function, and examine the…

强关联电子 · 物理学 2024-02-28 Mei-Wei Hu , Zhuo-Yan Fang , Hou-Jian Duan , Mou Yang , Ming-Xun Deng , Rui-Qiang Wang

Weyl semimetals have been intensely studied as a three dimensional realization of a Dirac-like excitation spectrum where the conduction bands and valence bands touch at isolated Weyl points in momentum space. Like in graphene, this property…

强关联电子 · 物理学 2017-11-22 Tobias Holder , Chia-Wei Huang , Pavel Ostrovsky

Weyl semimetal is a solid material with isolated touching points between conduction and valence bands in its Brillouin zone -- Weyl points. Low energy excitations near these points exhibit a linear dispersion and act as relativistic…

无序系统与神经网络 · 物理学 2024-01-24 M. E. Ismagambetov , P. M. Ostrovsky

Microscopic theory of the normal-to-superconductor coexistence line of a 2D two-band Weyl superconductor subjected to magnetic field is constructed. It is shown that a Weyl semi-metal that is nonsuperconducting or having a small critical…

超导电性 · 物理学 2018-01-03 Baruch Rosenstein , B. Ya. Shapiro , Dingping Li , I. Shapiro

We theoretically study the band structure and the electronic transport in the Weyl semimetal nanowires in magnetic fields, and demonstrate that the interplay of the Fermi-arc surface states and the bulk Landau levels plays a crucial role in…

介观与纳米尺度物理 · 物理学 2017-05-24 Akira Igarashi , Mikito Koshino

We study electric field and temperature gradient driven magnetoconductivity of a Weyl semimetal system. To analyze the responses, we utilize the kinetic equation with semiclassical equations of motion modified by the Berry curvature and…

介观与纳米尺度物理 · 物理学 2021-02-16 Vladimir A. Zyuzin

We explore theoretically the magnetoresistvity of three-dimensional Weyl and Dirac semimetals in transversal magnetic fields within two alternative models of disorder: (i) short-range impurities and (ii) charged (Coulomb) impurities.…

介观与纳米尺度物理 · 物理学 2015-11-11 J. Klier , I. V. Gornyi , A. D. Mirlin

The axial magnetic effect, i.e., the generation of an energy current parallel to an axial magnetic field coupling with opposite signs to left- and right-handed fermions is a non-dissipative transport phenomenon intimately related to the…

高能物理 - 理论 · 物理学 2014-02-28 Maxim N. Chernodub , Alberto Cortijo , Adolfo G. Grushin , Karl Landsteiner , Maria A. H. Vozmediano

When subjected to parallel electric field $\mathbf E$ and magnetic field $\mathbf B$, Weyl semimetals exhibit the exotic transport property known as the chiral anomaly due to the pumping of electrons between Weyl cones of opposite…

介观与纳米尺度物理 · 物理学 2019-06-19 Tianyu Liu , Zheng Shi

The external strain can lead to the similar effect to the external applied magnetic field. Such pseudomagnetic field can be larger than typical magnetic fields, what gives the opportunity to experimentally study the Landau levels. In this…

介观与纳米尺度物理 · 物理学 2025-05-06 Shivam Yadav , Andrzej Ptok

We study the density of states and magnetotransport properties of disordered Weyl semimetals, focusing on the case of a strong long-range disorder. To calculate the disorder-averaged density of states close to nodal points, we treat exactly…

介观与纳米尺度物理 · 物理学 2016-03-28 D. A. Pesin , E. G. Mishchenko , A. Levchenko

The existence of pseudomagnetic helicons is predicted for strained Dirac and Weyl materials. The corresponding collective modes are reminiscent of the usual helicons in metals in strong magnetic fields but can exist even without a magnetic…

介观与纳米尺度物理 · 物理学 2017-03-28 E. V. Gorbar , V. A. Miransky , I. A. Shovkovy , P. O. Sukhachov

Weyl semimetals (WSM) are a new class of topological materials that exhibit a bulk Hall effect due to time-reversal symmetry breaking, as well as a chiral magnetic effect due to inversion symmetry breaking. These unusual electromagnetic…

高能物理 - 理论 · 物理学 2019-05-01 A. Martín-Ruiz , M. Cambiaso , L. F. Urrutia

As they do not rely on the presence of any crystal symmetry, Weyl nodes are robust topological features of an electronic structure that can occur at any momentum and energy. Acting as sinks and sources of Berry curvature, Weyl nodes have…

A magnetic field can generally induce circular phonon dichroism based on the formation of Landau levels of electrons. Here, we study the magnetization-induced circular phonon dichroism in transition metal dichalcogenides, without forming…

介观与纳米尺度物理 · 物理学 2023-01-04 Wen-Yu Shan

In this paper, the nonlinear interaction of Weyl semimetal (WSM) with a strong driving electromagnetic wave-field is investigated. In the scope of the structure-gauge invariant low-energy nonlinear electrodynamic theory, the…

介观与纳米尺度物理 · 物理学 2022-06-22 H. K. Avetissian , V. N. Avetisyan , B. R. Avchyan , G. F. Mkrtchian

Three-dimensional Weyl and Dirac semimetals can support a chiral-symmetry-breaking, fully gapped, charge-density-wave order even for sufficiently weak repulsive electron-electron interactions, when placed in strong magnetic fields. In the…

介观与纳米尺度物理 · 物理学 2015-12-25 Bitan Roy , Jay D. Sau