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Olshanetsky, E B; Kvon, Z D; Gusev, G M; Levin, A D; Raichev, O E; Mikhailov, N N; Dvoretsky, S A
Physical review letters, 2015-Mar-27, Letnik: 114, Številka: 12Journal Article
Our experimental studies of electron transport in wide (14 nm) HgTe quantum wells confirm the persistence of a two-dimensional topological insulator state reported previously for narrower wells, where it was justified theoretically. Comparison of local and nonlocal resistance measurements indicate edge state transport in the samples of about 1 mm size at temperatures below 1 K. Temperature dependence of the resistances suggests an insulating gap of the order of a few meV. In samples with sizes smaller than 10 μm a quasiballistic transport via the edge states is observed.
