Video URL

https://pirsa.org/16020088

Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides

Dai, X. (2016). Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides. Perimeter Institute for Theoretical Physics. https://pirsa.org/16020088

Dai, Xi. Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides. Perimeter Institute for Theoretical Physics, Feb. 02, 2016, https://pirsa.org/16020088 

          @misc{ scivideos_PIRSA:16020088,
            doi = {10.48660/16020088},
            url = {https://pirsa.org/16020088},
            author = {Dai, Xi},
            keywords = {Quantum Matter},
            language = {en},
            title = {Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2016},
            month = {feb},
            note = {PIRSA:16020088 see, \url{https://scivideos.org/pirsa/16020088}}
          }

Xi Dai Universidade Federal do Rio Grande do Sul

DOI 10.48660/16020088
Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Based on first-principle calculations, we show that a family of nonmagnetic materials including TaAs, TaP, NbAs, and NbP are Weyl semimetals (WSM) without inversion centers. We find twelve pairs of Weyl points in the whole Brillouin zone (BZ) for each of them. In the absence of spin-orbit coupling (SOC), band inversions in mirror-invariant planes lead to gapless nodal rings in the energy-momentum dispersion. The strong SOC in these materials then opens full gaps in the mirror planes, generating nonzero mirror Chern numbers and Weyl points off the mirror planes. The transport properties obtained by the Boltzmann equation combined with the semiclassical treatments of the unique electronic structure in these materials will also be discussed in comparison with the most recent experimental data.