Weyl and Dirac semimetals in three-dimensional solids

NP Armitage, EJ Mele, A Vishwanath - Reviews of Modern Physics, 2018 - APS
Weyl and Dirac semimetals are three-dimensional phases of matter with gapless electronic
excitations that are protected by topology and symmetry. As three-dimensional analogs of …

Hourglass charge-three Weyl phonons

X Wang, F Zhou, Z Zhang, ZM Yu, Y Yao - Physical Review B, 2022 - APS
The unconventional Weyl point with nonlinear dispersion features higher topological charge|
C|> 1 and multiple topologically protected Fermi arc states at its boundary. As a novel …

Maximally charged single-pair multi-Weyl point phonons in -type

Y Yang, C ** and tilting on optics in noncentrosymmetric multi-Weyl semimetals
SP Mukherjee, JP Carbotte - Physical Review B, 2018 - APS
We calculate the absorptive part of the ac optical conductivity of a multi-Weyl semimetal with
winding number J in both the direction of the tilt σ zz (Ω) and perpendicular to it σ xx (Ω) as a …