LOGARITHMIC TEMPERATURE-DEPENDENCE OF CONDUCTIVITY AT HALF-FILLED LANDAU-LEVEL

Authors
KHVESHCHENKO DV
Citation
Dv. Khveshchenko, LOGARITHMIC TEMPERATURE-DEPENDENCE OF CONDUCTIVITY AT HALF-FILLED LANDAU-LEVEL, Physical review letters, 77(2), 1996, pp. 362-365
Citations number
26
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
77
Issue
2
Year of publication
1996
Pages
362 - 365
Database
ISI
SICI code
0031-9007(1996)77:2<362:LTOCAH>2.0.ZU;2-L
Abstract
We study the temperature dependence of the longitudinal conductivity a t half filled Landau level by means of the theory of composite fermion s in the weakly disordered regime (k(F)l >> 1). At low temperatures we find the leading In T correction resulting from the interference betw een impurity scattering and gauge interactions of the composite fermio ns. The prefactor appears to be strongly enhanced as compared to the s tandard Altshuler-Aronov term in agreement with recent experimental ob servations.