Fizika Nizkikh Temperatur: Volume 45, Number 1 (January 2019), p. 121-127    ( to contents , go back )

Deformation-induced phase transition in Weyl semimetals: pseudofield origin of effect

Z.Z. Alisultanov, G.O. Abdullaev

Amirkhanov Institute of Physics of Daghestan Scientific Center of RAS 94 Yaragskovo Str., Makhachkala 367003, Russia
E-mail: E-mail: zaur0102@gmail.com

Dagestan State University, 43-a Gadzhiyev Str., Makhachkala 367000, Russia

N.A. Demirov

Joint Institute for High Temperatures, Russian Academy of Sciences,Izhorskaya St. 13, Bd. 2, Moscow 125412, Russia

Received February 19, 2018, revised August 30, 2018, published online November 26, 2018

Abstract

The deformation of the crystal lattice of Weyl materials, in which the Weyl points with opposite chiralities are separated in the momentum space, leads to the appearance of gauge pseudofields. Under the action of such fields in some Weyl semimetals (WSMs), coexistence of two types (type I and type II) of Weyl fermions is possible. The latter is connected with the fact that the phase transition between types I and II under the action of pseudo-fields occurs only near one of the Weyl points. We predicted such a phase transition upon bending of thin films of Weyl semimetals.

Key words: Weyl semimetals, gauge pseudofields, Landau levels, phase transition.

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