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Gusev, G.M; Leite, J.R; Olshanetskii, E.B; Moshegov, N.T; Toropov, A.I; Maude, D.K; Casse, M; Portal, J.C
Physica. B, Condensed matter, April 2001, 2001-04-00, Letnik: 298, Številka: 1-4Journal Article
We examine the activated conductivity for Landau levels at filling factors N=1,2 in a parabolic AlxGa1−xAs well down to 30mK. We assume that the possible mechanism of transport is a hopping conductivity in the middle between overlapping levels. These results demonstrate that the plateau at N=1,2 in quantum Hall effect are due to the energy gaps between electric subbands.
