Scattering on a rectangular potential barrier in nodal-line Weyl semimetals

Abstract

We investigate single-particle ballistic scattering on a rectangular barrier in the nodal-line Weyl semimetals. Since the system under study has a crystallographic anisotropy, the scattering properties are dependent on mutual orientation of the crystalline axis and the barrier. To account for the anisotropy, we examine two different barrier orientations. It is demonstrated that, for certain angles of incidence, the incoming particle passes through the barrier with probability of unity. This is a manifestation of the Klein tunneling, a familiar phenomenon in the context of graphene and semimetals with Weyl points. However, the Klein tunneling in the Weyl-ring systems is observed when the angle of incidence differs from 90${}^{\circ }$, unlike the cases of graphene and Weyl-point semimetals. The reflectionless transmission also occurs for the so-called `magic angles'. The values of `the magic angles' are determined by geometrical resonances between the barrier width and the de Broglie length of the scattered particle. In addition, we show that under certain conditions the wave function of the transmitted and reflected particles may be a superposition of two plane waves with unequal momenta. Such a feature is a consequence of the non-trivial structure of the iso-energy surfaces of the nodal-line semimetals.

arXiv comment7 pages, 6 figuries

References in corpus (20)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Chiral tunneling and the Klein paradox in graphene
• Weyl Semimetal in a Topological Insulator Multilayer
• Topological nodal semimetals
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
• Quantum interference and Klein tunneling in graphene heterojunctions
• Topological nodal line semimetals with and without spin-orbital coupling
• Dirac Line Nodes in Inversion Symmetric Crystals
• Topological Nodal Line Semimetal and Dirac Semimetal State in Antiperovskite Cu${}_3$PdN
• Selective transmission of Dirac electrons and ballistic magnetoresistance of \textit{n-p} junctions in graphene
• Evidence of Klein tunneling in graphene p-n junctions
• Topological nodal line semimetals
• Topological Semimetals
• Electronic properties of graphene-based bilayer systems
• Observation of Topological Nodal Fermion Semimetal Phase in ZrSiS
• Potential ring of Dirac nodes in a new polymorph of Ca${}_3$P${}_2$
• Klein Backscattering and Fabry-Perot Interference in Graphene Heterojunctions
• Chiral tunneling in single and bilayer graphene
• Collective modes in nodal line semimetals

Cited by in corpus (3)

• Floquet transmission in Weyl/multi-Weyl and nodal-line semimetals through a time-periodic potential well
• Double Andreev reflections and double normal reflections in nodal-line semimetal-superconductor junctions
• Andreev bound states in Josephson junctions of semi-Dirac semimetals