| Numéro |
J. Phys. IV France
Volume 12, Numéro 9, November 2002
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|---|---|---|
| Page(s) | 329 - 329 | |
| DOI | https://doi.org/10.1051/jp4:20020430 | |
J. Phys. IV France 12 (2002) Pr9-329
DOI: 10.1051/jp4:20020430
Transverse depinning threshold revealed by non linear Hall effect of Wigner solid in a disorder field
F.I.B. Williams1, F. Perruchot1, B. Etienne2, C.J. Mellor3, R. Gaal1, B. Sas4, M. Hannini3, T. Foxon3 and J. Harris51 CEA-Saclay, France
2 CNRS, France
3 University of Nottingham, U.K.
4 SzFKI Budapest, Hungary
5 Imperial College, University of London, U.K.
Abstract
Both electrons and holes at a GaAs/GaAlAs heterojunction show a non linear Hall effect as a
function of current in the magnetically induced Wigner solid phase. Arguing that this arises
from a threshold Lorentz force transverse to the current lines, this threshold is found to be
proportional to the longitudinal depinning threshold and about 10% of its value. This is to be
compared with theoretical predictions by Giamarchi and LeDoussal and with numerical
simulation results (Moon, Scalettar and Zimanyi).
© EDP Sciences 2002