Time-reversal invariant realization of the Weyl semimetal phase
By G. B. Hal'asz, L. Balents. 2011
239 citations recorded by the source corpus.
We propose a realization of the Weyl semimetal phase that is invariant under time reversal and occurs due to broken inversion symmetry. We consider both a simple superlattice model and a more realistic tight-binding model describing an experimentally reasonable HgTe/CdTe multilayer structure. The two models have the same underlying symmetry, therefore their low-energy features are equivalent. We find a Weyl semimetal phase between the normal insulator and the topological insulator phases that exists for a finite range of the system parameters and exhibits a finite number of Weyl points with robust band touching at the Fermi level. This phase is experimentally characterized by a strong conductivity anisotropy and topological surface states. The principal conductivities change in a complementary fashion as the system parameters are varied, and the surface states only exist in a region of momentum space that is determined by the positions of the Weyl points.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/059c2ab3cb694b16869f29b218cf5f905415d527
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In Atomic and Molecular Physics, and Optics
In Condensed Matter Physics
In Materials Chemistry
Citations in the corpus
- Experimental discovery of Weyl semimetal TaAs (2015, unknown): “[30] G.”
- Observation of the Chiral-Anomaly-Induced Negative Magnetoresistance in 3D Weyl Semimetal TaAs (2015, background): “[21] G.”
- Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides (2014, background): “The first one is a superlattice system formed by alternatively stacking normal and topological insulators [19,20].”
- Weyl and Dirac semimetals in three-dimensional solids (2017, background): “However, we note that it may also be excluded even in magnetic WSMs where, for example, cubic symmetry is preserved.”