We suggest a theory for a deformable and sliding charge density wave (CDW) in
the Hall bar geometry for the quantum limit when the carriers in remnant small
pockets are concentrated at lowest Landau levels (LL) forming a fractionally
(ν<1) filled quantum Hall state. The gigantic polarizability of the CDW
allows for a strong redistribution of electronic densities up to a complete
charge segregation when all carriers occupy, with the maximum filling, a
fraction ν of the chain length - thus forming the integer quantum Hall
state, while leaving the fraction (1−ν) of the chain length unoccupied. The
electric field in charged regions easily exceeds the pinning threshold of the
CDW, then the depinning propagates into the nominally pinned central region via
sharp domain walls. Resulting picture is that of compensated collective and
normal pulsing counter-currents driven by the Hall voltage. This scenario is
illustrated by numerical modeling for nonstationary distributions of the
current and the electric field. This picture can interpret experiments in
mesa-junctions showing depinning by the Hall voltage and the generation of
voltage-controlled high frequency oscillations (Yu.I. Latyshev, P. Monceau,
A.A. Sinchenko, et al, presented at ECRYS-2011, unpublished).Comment: After International School - Workshop on Electronic Crystals:
ECRYS-201