Tunneling Conductance in a Two-dimensional Dirac Semimetal Protected by Non-symmorphic Symmetry

Abstract

We theoretically study a tunneling effect in a two-dimensional Dirac semimetal with two Dirac points protected by non-symmorphic symmetries. The tunnel barrier can be arranged by a magnetic exchange potential which opens a gap at the Dirac points which can be induced by a magnetic proximity effect of a ferromagnetic insulator. We found that the tunnel decay length increases with a decrease in the strength of the spin-orbit coupling, and moreover the dependence is attributed to the correlation of sublattice and spin degree of freedoms which lead to symmetry-protected Dirac points. The tunnel probability is quite different in two Dirac points, and thus the tunnel effect can be applied to the highly-selective valley filter.

arXiv comment5 pages

References in corpus (18)

• The electronic properties of graphene
• Quantum Spin Hall Effect in Graphene
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
• Weyl Semimetal in a Topological Insulator Multilayer
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Dirac semimetal in three dimensions
• Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
• Experimental Realization of a Three-Dimensional Dirac Semimetal
• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Dirac Cone Protected by Non-Symmorphic Symmetry and 3D Dirac Line Node in ZrSiS
• Dirac Semimetals in Two Dimensions
• Nonsymmorphic symmetry-required band crossings in topological semimetals
• Strain-induced nonsymmorphic symmetry breaking and removal of Dirac semimetallic nodal line in an orthoperovskite iridate
• Topological phases in Iridium oxide superlattices: quantized anomalous charge or valley Hall insulators
• Interface Metallic States between a Topological Insulator and a Ferromagnetic Insulator
• Three-dimensional symmetry breaking topological matters

Cited by in corpus (4)

• Chemical Principles of Topological Semimetals
• Topological Semimetals in Square-Net Materials
• Frequency-dependent Faraday and Kerr rotation in anisotropic nonsymmorphic Dirac semimetals
• Spin and electric currents induced by a spin-motive force in two-dimensional Dirac semimetals protected by nonsymmorphic symmetries