Solid State Communications
Volume 113, Issue 4 SummaryPlus 8 December 1999 Article
Pages 213-216
Quantum Hall transitions in field-induced spin density systems
P. Lederer and B. Horovitz
Laboratoire Associé Au, C.N.R.S., Physique des Solides, Université Paris-Sud, 91405 Orsay Cedex, France
Received 20 July 1999; revised 10 September 1999; accepted 21 September
1999 by J. Joffrin
Available online 29 November 1999.
Abstract
Field-induced spin density wave (FISDW) systems exhibit coexistence phases
between well-defined Quantum Hall plateaux phases with even integers 2N and
2N'. We show that a disordered coexistence region accounts for the observed
peaks in the longitudinal reisitivity as the field varies between plateaux.
It also results in a random spin mixing which yields two energy-split extended
states. The longitudinal resistance is expected to show two peaks with a temperature
(T) dependent width ~T. The peak width should saturate below the non-nesting
interlayer coupling of 40mK.
Copyright © 1999 Elsevier Science Ltd.
Author Keywords: A. Magnetically ordered materials; A. Organic crystals; D. Electronic transport; D. Quantum Hall effect