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