Peierls-type structural phase transition in a crystal induced by magnetic breakdown (CROSBI ID 193773)
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Podaci o odgovornosti
Kadigrobov, Anatoly ; Bjeliš, Aleksa ; Radić, Danko
engleski
Peierls-type structural phase transition in a crystal induced by magnetic breakdown
We predict a new type of phase transition in a quasi-two dimensional system of electrons at high magnetic fields, namely the stabilization of a density wave which transforms a two dimensional open Fermi surface into a periodic chain of large pockets with small distances between them. The quantum tunneling of electrons between the neighboring closed orbits enveloping these pockets transforms the electron spectrum into a set of extremely narrow energy bands and gaps which decreases the total electron energy, thus leading to a magnetic breakdown induced density wave (MBIDW) ground state. We show that this DW instability has some qualitatively different properties in comparison to analogous DW instabilities of Peierls type ; e.g. the critical temperature of the MBIDW phase transition arises and disappears in a peculiar way with a change of the inverse magnetic field.
magnetic breakdown; Peierls transition; density wave; quasi one-dimensional
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Podaci o izdanju
86 (6)
2013.
276-1-276-11
objavljeno
1434-6028
10.1140/epjb/e2013-40206-1