Massive Dirac fermions in layered BaZnBi
arXiv:1808.07640 · doi:10.1103/PhysRevMaterials.3.024202
Abstract
Using angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) we study the electronic structure of layered BaZnBi. Our experimental results show no evidence of Dirac states in BaZnBi originated either from the bulk or the surface. The calculated band structure without spin-orbit interaction shows several linear dispersive band crossing points throughout the Brillouin zone. However, as soon as the spin-orbit interaction is turned on, the band crossing points are significantly gapped out. The experimental observations are in good agreement with our DFT calculations. These observations suggest that the Dirac fermions in BaZnBi are trivial and massive. We also observe experimentally that the electronic structure of BaZnBi comprises of several linear dispersive bands in the vicinity of Fermi level dispersing to a wider range of binding energy.
7 pages, 4 figures
References in corpus (49)
- Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
- Two-Dimensional Gas of Massless Dirac Fermions in Graphene
- Topological Insulators
- Spintronics: Fundamentals and applications
- Non-Abelian Anyons and Topological Quantum Computation
- Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
- Weyl Semimetal in a Topological Insulator Multilayer
- Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
- Dirac semimetal in three dimensions
- Titanic Magnetoresistance in WTe2
- Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
- Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
- Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
- Electronic States of Graphene Nanoribbons
- Experimental Realization of a Three-Dimensional Dirac Semimetal
- Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal NbP
- Experimental observation of topological Fermi arcs in type-II Weyl semimetal MoTe2
- Spectroscopic evidence for type II Weyl semimetal state in MoTe2
- Observation of the Type-II Weyl Semimetal Phase in MoTe2
- Anisotropic Dirac fermions in a Bi square net of SrMnBi2
- Fermi arcs and their topological character in the candidate type-II Weyl semimetal MoTe2
- Quantum Hall effect in a bulk antiferromagnet EuMnBi with magnetically confined two-dimensional Dirac fermions
- Helicity protected ultrahigh mobility Weyl fermions in NbP
- A magnetic topological semimetal Sr1-yMn1-zSb2 (y, z< 0.1)
- Tantalum Monoarsenide: an Exotic Compensated Semimetal
- Electron scattering in tantalum monoarsenide
- Quantum transport of two-dimensional Dirac fermions in SrMnBi2
- Two dimensional Dirac fermions and quantum magnetoresistance in CaMnBi
- Anisotropic Dirac electronic structures of AMnBi (A=Sr, Ca)
- Magnetotransport of single crystalline NbAs
- Effect of Eu magnetism on the electronic properties of the candidate Dirac material EuMnBi2
- Coupling of magnetic order to planar Bi electrons in the anisotropic Dirac metals AMnBi2 (A = Sr, Ca)
- Nontrivial Berry phase in magnetic BaMnSb2 semimetal
- Nearly massless Dirac fermions hosted by Sb square net in BaMnSb2
- Interplay of Dirac electrons and magnetism in AMnBi2 (A=Ca, Sr)
- Electron-hole asymmetry, Dirac fermions, and quantum magnetoresistance in BaMnBi2
- Observation of two-dimensional Fermi surface and Dirac dispersion in YbMnSb
- MoTe2 : An uncompensated semimetal with extremely large magnetoresistance
- Unconventional transformation of spin Dirac phase across a topological quantum phase transition
- Large linear magnetoresistance in a new Dirac material BaMnBi2
- Observation of well-defined quasi-particle over a wide energy range in quasi-2D system
- Observation of Dirac surface states in the hexagonal PtBi2, a possible origin of the linear magnetoresistance
- Universal response of the type-II Weyl semimetals phase diagram
- Interlayer electronic transport in CaMnBi antiferromagnet
- Quantum oscillations and Dirac dispersion in the BaZnBi2 semimetal guaranteed by local Zn vacancy order
- Absence of Dirac states in BaZnBi induced by spin-orbit coupling
- Magneto-transport and Electronic Structures of BaZnBi
- Temperature independent band structure of WTe2 as observed from ARPES
- Spectroscopic evidence of topological phase transition in 3D Dirac semimetal Cd(AsP)