Theory of magnetic field-Induced charge-density-wave phases
A. G. Lebed
Department of Physics, Boston College, Chestnut Hill, MA 02467, USA
Landau Institute for Theoretical Physics RAS, 117334 Moscow, Russia
PACS: 72.15.Gd, 74.70.Kn
Abstract
We elaborate an analytical theory of a cascade
of magnetic field-induced charge-density-wave
(FICDW) phases.
It is shown that the following features
distinguish it from the well-known spin-density-wave
cascade:
1) the FICDW phases exist at temperatures
much lower than the characteristic CDW transition
temperature at H=0; 2) the cascade of the
FICDW phases dramatically changes at certain directions
of a magnetic field due to an interplay of Zeeman
spin-splitting and an electron motion along open Fermi
surfaces.
Theoretical results are compared with the recent
experimental attempts to reveal the FICDW phases
in organic conductors
α-(ET)2MHg(SCN)4
(M = K, Tl, Rb, etc.).