Spin mixing between subbands and extraordinary Landau-level shift in wide HgTe quantum wells

A. A. Dobretsova, A. D. Chepelianskii, N. N. Mikhailov, Z. D. Kvon

Результат исследования: Научные публикации в периодических изданияхстатья

1 Цитирования (Scopus)

Аннотация

We present both the experimental and theoretical investigations of a nontrivial electron Landau-level shift in magnetic field in wide (∼20 nm) HgTe quantum wells: Landau levels split under magnetic fields but become degenerate again when magnetic field increases. We reproduced this behavior qualitatively within an isotropic six-band Kane model; then using semiclassical calculations, we showed this behavior is due to the mixing of the conduction band with a total spin of 3/2 with the next well subband with a spin of 1/2, which reduces the average vertical spin from 3/2 to around 1. This change in the average spin changes the Berry phase, explaining the evolution of Landau levels under magnetic field.

Язык оригиналаанглийский
Номер статьи155310
Число страниц10
ЖурналPhysical Review B
Том98
Номер выпуска15
DOI
СостояниеОпубликовано - 11 окт 2018

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