Composite Fermions in Modulated Structures: Transport and Surface Acoustic Waves

Preprint

13 May 1998

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9712031

Abstract

Motivated by a recent experiment of Willett et al. [Phys. Rev. Lett. 78, 4478 (1997)], we employ semiclassical composite-fermion theory to study the effect of a periodic density modulation on a quantum Hall system near Landau level filling factor nu=1/2. We show that even a weak density modulation leads to dramatic changes in surface-acoustic-wave (SAW) propagation, and propose an explanation for several key features of the experimental observations. We predict that properly arranged dc transport measurements would show a structure similar to that seen in SAW measurements.

Keywords

SURFACE ACOUSTIC WAVE
DENSITY MODULATION
COMPOSITE FERMION
WAVES MOTIVATED
ACOUSTIC WAVES
FERMIONS

All Related Versions

Version 1, 1997-12-03, ArXiv
Version 2, 1998-05-13, ArXiv
Published version: Physical Review Letters, 80 (20), 4494.

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