Two step I to II type transitions in layered Weyl semi-metals and their impact on superconductivity.

ABSTRACT: Novel "quasi two dimensional" typically layered (semi) metals offer a unique opportunity to control the density and even the topology of the electronic matter. Along with doping and gate voltage, a robust tuning is achieved by application of the hydrostatic pressure. In Weyl semi-metals the tilt of the dispersion relation cones, [Formula: see text] increases with pressure, so that one is able to reach type II ([Formula: see text]starting from the more conventional type I Weyl semi-metals [Formula: see text]. The microscopic theory of such a transition is constructed. It is found that upon increasing pressure the I to II transition occurs in two continuous steps. In the first step the cones of opposite chirality coalesce so that the chiral symmetry is restored, while the second transition t

SUBMITTER: Rosenstein B 

PROVIDER: S-EPMC10213019 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature