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The density of states of carriers in a high-mobility InAs single quantum well is spin split by the Rashba effect. The asymmetry favors down-spin states for carriers with positive momentum and up-spin states for carriers with negative momentum. Imposing a bias current causes inequivalent shifts of the spin subband chemical potential, which are detected using a ferromagnetic film electrode and an open circuit voltage measurement. Measurements made on three samples over a range 77<T<296K demonstrate spin detection at a ferromagnet-semiconductor interface and corroborate earlier experimental results of spin-dependent interfacial resistance.
Hammar et al. (Wed,) studied this question.
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