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We investigate the electric and thermal transport properties in a disordered Weyl ferromagnet on an equal footing by using the Keldysh formalism in curved spacetime. In particular, we calculate the anomalous thermal Hall conductivity, which…

介观与纳米尺度物理 · 物理学 2017-04-06 Atsuo Shitade

Weyl semimetals are a new paradigmatic topological phase of matter featuring a gapless spectrum. One of its most distinctive features is the presence of Fermi arc surface states. Here, we report on atomistic simulations of the dc…

介观与纳米尺度物理 · 物理学 2018-03-20 Jose Chesta Lopez , Luis E. F. Foa Torres , Alvaro S. Nunez

We explore the thermoelectric transport properties of a coexistence topological semimetal, characterized by the presence of both a pair of Weyl points and a nodal ring in the quantum limit. This system gives rise to complex Landau bands…

介观与纳米尺度物理 · 物理学 2024-03-12 L. W. Guo , C. M. Wang

Weyl semimetals harbor topological Fermi-arc surface states which determine the nontrivial charge current response to external fields. We here study the quasiparticle decay rate of Fermi arc states arising from their coupling to acoustic…

介观与纳米尺度物理 · 物理学 2022-02-11 Francesco Buccheri , Alessandro De Martino , Rodrigo G. Pereira , Piet W. Brouwer , Reinhold Egger

The emergence of gapless surface states, known as Fermi arcs (FAs), is one of the unique properties of the novel topological Weyl semimetal (WSM). However, extracting the signatures of FAs from the bulk states has always been a challenge as…

介观与纳米尺度物理 · 物理学 2024-06-18 Amartya Pal , Paramita Dutta , Arijit Saha

Weyl semimetals host topologically protected surface states, the so-called Fermi arcs, that have a penetration depth into the bulk that depends on surface-momentum, and diverges at the Weyl points. It has recently been observed in PtBi$_2$…

超导电性 · 物理学 2025-09-12 Mattia Trama , Viktor Könye , Ion Cosma Fulga , Jeroen van den Brink

Weyl semimetals (WSMs), a new type of topological condensed matter, are currently attracting great interest due to their unusual electronic states and intriguing transport properties such as chiral anomaly induced negative…

介观与纳米尺度物理 · 物理学 2018-02-23 Giacomo Resta , Shu-Ting Pi , Xiangang Wan , Sergey Y. Savrasov

For a Weyl semimetal (WSM) in a magnetic field, a semiclassical description of the Fermi-arc surface state dynamics is usually employed for explaining various unconventional magnetotransport phenomena, e.g., Weyl orbits, the…

介观与纳米尺度物理 · 物理学 2024-12-02 Tim Bauer , Francesco Buccheri , Alessandro De Martino , Reinhold Egger

We calculate the surface dc conductivity of Weyl semimetals and show that it contains an anomalous contribution in addition to a Drude contribution from the Fermi arc. The anomalous part is independent of the surface scattering time, and…

介观与纳米尺度物理 · 物理学 2022-12-23 Hridis K. Pal , Osakpolor Eki Obakpolor , Pavan Hosur

A signature property of Weyl semimetals is the existence of topologically protected surface states - arcs in momentum space that connect Weyl points in the bulk. However, the presence of bulks states makes detection of surface contributions…

We present a semiclassical explanation for the morphology of the surface Fermi arcs of Weyl semimetals. Viewing the surface states as a two-dimensional Fermi gas subject to band bending and Berry curvatures, we show that it is the…

介观与纳米尺度物理 · 物理学 2022-07-26 Jiajia Huang , Luyang Wang , Dao-Xin Yao

Weyl semimetals are gapless quasi-topological materials with a set of isolated nodal points forming their Fermi surface. They manifest their quasi-topological character in a series of topological electromagnetic responses including the…

介观与纳米尺度物理 · 物理学 2016-02-05 Hassan Shapourian , Taylor L. Hughes

Weyl semimetals are topological materials with protected Weyl nodes in the band structure. In these materials the surface states form open curves at the Fermi surface, Fermi arcs in Weyl semimetals and drumhead states of nodal-line…

介观与纳米尺度物理 · 物理学 2019-02-27 Enrique Benito-Matías , Rafael A. Molina

Weyl semimetals host topologically protected surface states, with arced Fermi surface contours that are predicted to propagate through the bulk when their momentum matches that of the surface projections of the bulk's Weyl nodes. We use…

介观与纳米尺度物理 · 物理学 2016-03-14 Hiroyuki Inoue , Andras Gyenis , Zhijun Wang , Jian Li , Seong Woo Oh , Shan Jiang , Ni Ni , B. Andrei Bernevig , Ali Yazdani

We study longitudinal transport in Weyl semimetal nanowires, both in the absence and in the presence of a magnetic flux threading the nanowires. We identify two qualitatively different regimes of transport with respect to the chemical…

介观与纳米尺度物理 · 物理学 2019-08-21 Vardan Kaladzhyan , Jens H. Bardarson

Recent experiments on non-magnetic Weyl semimetals have seen separate bulk and surface superconductivity in Weyl semimetals, which raises the question of whether the surface Fermi arcs can support intrinsic superconductivity while the bulk…

强关联电子 · 物理学 2023-11-21 Aymen Nomani , Pavan Hosur

We present systematic theoretical studies of both bulk and surface electromagnetic eigenmodes, or polaritons, in Weyl semimetals. We derive the tensors of bulk and surface conductivity taking into account all possible combinations of the…

介观与纳米尺度物理 · 物理学 2019-02-27 Qianfan Chen , A. Ryan Kutayiah , Ivan Oladyshkin , Mikhail Tokman , Alexey Belyanin

Weyl semimetals, with their unique electronic band structure, have drawn significant interest for their potential to explore quantum anomalies in condensed matter systems. In this study, we investigate the large positive magneto-thermal…

In this paper, we discuss the effect of a periodically driving circularly polarized laser beam in the high frequency limit, on the band structure and thermal transport properties of type-I and type-II Weyl semimetals (WSMs). We develop the…

介观与纳米尺度物理 · 物理学 2018-11-14 Anirudha Menon , Debashree Chowdhury , Banasri Basu

By making use of a low-energy effective model of Weyl semimetals, we show that the Fermi arc transport is dissipative. The origin of the dissipation is the scattering of the surface Fermi arc states into the bulk of the semimetal. It is…

介观与纳米尺度物理 · 物理学 2016-06-27 E. V. Gorbar , V. A. Miransky , I. A. Shovkovy , P. O. Sukhachov
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