D. A. Kozlov, Z. D. Kvon, N. N. Mikhailov, S. A. Dvoretskii, “Weak localization of Dirac fermions in HgTe quantum wells”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2012, Volume 96, Issue 11,Pages <nobr>815

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CONDENSED MATTER

Weak localization of Dirac fermions in HgTe quantum wells

D. A. Kozlov^ab, Z. D. Kvon^ba, N. N. Mikhailov^a, S. A. Dvoretskii^a

^a A. V. Rzhanov Institute of Semiconductor Physics of SB RAS, Novosibirsk
^b Novosibirsk State University

Abstract: Weak localization in a system of gapless two-dimensional Dirac fermions in HgTe quantum wells with thickness $d = 6.6$ nm, which corresponds to the transition from a normal to an inverted spectrum, has been investigated experimentally. A negative logarithmic correction to the conductivity of the system has been observed both at the Dirac point and in the vicinity of this point. The anomalous magnetoresistance of two-dimensional Dirac fermions is positive. This indicates that weak localization in the system of two-dimensional Dirac fermions occurs owing to localization and interaction effects in the presence of rapid spin relaxation.

Received: 31.10.2012