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Weyl semimetal is a recently discovered state of quantum matter, which generally possesses tilted energy dispersion. Here, we investigate the electron tunneling through a Weyl semimetal p-n-p junction. The angular dependence of electron…

介观与纳米尺度物理 · 物理学 2017-08-23 Can Yesilyurt , Seng Ghee Tan , Gengchiau Liang , Shengyuan A. Yang , Mansoor B. A. Jalil

Klein tunneling refers to the absence of normal backscattering of electrons even under the case of high potential barriers. At the barrier interface, the perfect matching of electron and hole wavefunctions enables a unit transmission…

介观与纳米尺度物理 · 物理学 2016-12-20 Can Yesilyurt , Seng Ghee Tan , Gengchiau Liang , Mansoor B. A. Jalil

We solve the Weyl electron scattered by a spherical step potential barrier. Tuning the incident energy and the potential radius, one can enter both quasiclassical and quantum regimes. Transport features related to far-field currents and…

介观与纳米尺度物理 · 物理学 2018-05-07 Ming Lu , Xiao-Xiao Zhang

We numerically study the three-dimensional (3D) quantum Hall effect (QHE) and magnetothermoelectric transport of Weyl semimetals in the presence of disorder. We obtain a bulk picture that the exotic 3D QHE emerges in a finite range of Fermi…

介观与纳米尺度物理 · 物理学 2021-08-18 R. Ma , D. N. Sheng , L. Sheng

Tunneling transport across the p-n-p junction of Weyl semimetal with tilted energy dispersion is investigated. We report that the electrons around different valleys experience opposite direction refractions at the barrier interface when the…

介观与纳米尺度物理 · 物理学 2018-02-12 Can Yesilyurt , Zhuo Bin Siu , Seng Ghee Tan , Gengchiau Liang , Shengyuan A. Yang , Mansoor B. A. Jalil

We investigate the tunneling conductance of Weyl semimetal with tilted energy dispersion by considering electron transmission through a p-n-p junction with one-dimensional electric and magnetic barrier. In the presence of both electric and…

介观与纳米尺度物理 · 物理学 2017-07-21 Can Yesilyurt , Seng Ghee Tan , Gengchiau Liang , Mansoor B. A. Jalil

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

It is necessary to study the properties of Weyl semimetal nanostructures for potential applications in nanoelectronics. Here we study the Weyl semimetal quantum dot with a most simple model Hamiltonian with only two Weyl points. We focus on…

介观与纳米尺度物理 · 物理学 2019-08-13 Zhang Shu-feng , Zhang Chang-wen , Wang Pei-ji , Sun Qing-feng

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 semimetal may be thought of as a gapless topological phase protected by the chiral anomaly, where the symmetries involved in the anomaly are the $U(1)$ charge conservation and the crystal translational symmetry. The absence of a band…

强关联电子 · 物理学 2020-03-09 Chong Wang , L. Gioia , A. A. Burkov

We study the low-energy single-electron transport across a junction of two magnetic Weyl semimetals, in which the anisotropy axes are tilted one respect to the other. Using a two-band model with a potential step, we compute the transmission…

介观与纳米尺度物理 · 物理学 2022-07-15 Francesco Buccheri , Reinhold Egger , Alessandro De Martino

Weyl semimetal is a three-dimensional material with a conical spectrum near an even number of point nodes, where two bands touch each other. Here we study spectral properties of surface electron states in such a system. We show that the…

介观与纳米尺度物理 · 物理学 2014-06-09 Alexander P. Protogenov , Valery A. Verbus , Evgueni V. Chulkov

We calculate the transport properties of three-dimensional Weyl fermions in a disordered environment. The resulting conductivity depends only on the Fermi energy and the scattering rate. First we study the conductivity at the spectral node…

无序系统与神经网络 · 物理学 2016-12-07 K. Ziegler

We investigate magnetotransport across an interface between two Weyl semimetals (finite in both directions) whose Weyl nodes project onto two different surfaces which are twisted with respect to each other before being coupled. This gives…

介观与纳米尺度物理 · 物理学 2025-11-20 Nirnoy Basak , Sumathi Rao , Faruk Abdulla

Due to the many unique transport properties of Weyl semimetals, they are promising materials for modern electronics. We investigate the electrons in the strong coupling approximation near Weyl points based on their representation as…

介观与纳米尺度物理 · 物理学 2021-09-15 Mariya Iv. Trukhanova , Pavel Andreev

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

We study superconductivity in a Weyl semimetal with a tilted dispersion around two Weyl points of opposite chirality. In the absence of any tilt, the state with zero momentum pairing between two Fermi sheets enclosing each Weyl point has…

超导电性 · 物理学 2018-04-04 M. Alidoust , K. Halterman , A. A. Zyuzin

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 introduce (3+1) dimensional models of short-range-interacting electrons that form a strongly correlated many-body state whose low-energy excitations are relativistic neutral fermions coupled to an emergent gauge field, $\text{QED}_{4}$.…

强关联电子 · 物理学 2018-11-21 Eran Sagi , Ady Stern , David F. Mross

We compute the transmission coefficients and zero-temperature conductance for chiral quasiparticles propagating through various geometries, which consist of junctions of three-dimensional nodal-point semimetals. In the first scenario, we…

介观与纳米尺度物理 · 物理学 2024-12-30 Ipsita Mandal
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