The Rashba Hamiltonian and electron transport

Details The Rashba Hamiltonian and electron transport The Rashba Hamiltonian and electron transport

2001-04-06

arxiv.org/abs/cond-mat/0104109v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

one tex file, two figures; paper to appear in this form in PRB (RC)

Scientific paper

10.1103/PhysRevB.64.121202

The Rashba Hamiltonian describes the splitting of the conduction band as a result of spin-orbit coupling in the presence of an external field and is commonly used to model the electronic structure of confined narrow-gap semiconductors. Due to the mixing of spin states some care has to be exercised in the calculation of transport properties. We derive the velocity operator for the Rashba-split conduction band and demonstrate that the transmission of an interface between a ferromagnet and a Rashba-split semiconductor does not depend on the magnetization direction, in contrast with previous assertions in the literature.

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