Detection of spin-polarized electrons injected into a two-dimensional electron gas

Detection of spin-polarized electrons injected into a two-dimensional electron gas

The spin-dependent mean-free path of electrons in a high-mobility InAs two-dimensional electron gas (2DEG) is measured. Ferromagnetic metal/insulator/2DEG junctions are fabricated on a common channel in a nonlocal geometry and used as spin injectors and detectors. For electrons in spin-orbit eigenst...

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Veröffentlicht in:Physical review letters 2002-02, Vol.88 (6), p.066806-066806, Article 066806
Hauptverfasser: Hammar, P R, Johnson, Mark
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Johnson, Mark
description The spin-dependent mean-free path of electrons in a high-mobility InAs two-dimensional electron gas (2DEG) is measured. Ferromagnetic metal/insulator/2DEG junctions are fabricated on a common channel in a nonlocal geometry and used as spin injectors and detectors. For electrons in spin-orbit eigenstates at 4.5 K, lower bounds for the spin mean-free path and relaxation time are Lambda(S) > or = 4.6 microm and tau(s) > or = 3.8 ps, respectively. The temperature dependence is weak over the range 4.5
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title Detection of spin-polarized electrons injected into a two-dimensional electron gas
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