ФТП, 2008, том 42, выпуск 8

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Spin-orbit terms in multi-subband electron systems:
A bridge between bulk and two-dimensional Hamiltonians

K.V.Kavokin, M.E.Portnoi *,

Ioffe Physicotechnical Institute,
194021 St. Petersburg, Russia
* School of Physics, University of Exeter,
Exeter EX4 4QL, United Kingdom

(Получена 6 февраля 2008 г. Принята к печати 11 февраля 2008 г.)

We analyze the spin-orbit terms in multi-subband quasi-two-dimensional electron systems, and how they descend from the bulk Hamiltonian of the conduction band. Measurements of spin-orbit terms in one subband alone are shown to give incomplete information on the spin-orbit Hamiltonian of the system. They should be complemented by measurements of inter-subband spin-orbit matrix elements. Tuning electron energy levels with a quantizing magnetic field is proposed as an experimental approach to this problem.

PACS: 73.21.Fg, 71.70.Ej, 73.90.+f

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