Spin gunn effect

We predict that the flow of unpolarized current in electron-doped GaAs and InP at room temperature is unstable at high electric fields to the dynamic formation of spin-polarized current pulses. Spin-polarized current is spontaneously generated because the conductivity of a spin-polarized electron ga...

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Veröffentlicht in:Physical review letters 2006-01, Vol.96 (2), p.026602-026602, Article 026602
Hauptverfasser: Qi, Yunong, Yu, Zhi-Gang, Flatté, Michael E
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Sprache:eng
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Zusammenfassung:We predict that the flow of unpolarized current in electron-doped GaAs and InP at room temperature is unstable at high electric fields to the dynamic formation of spin-polarized current pulses. Spin-polarized current is spontaneously generated because the conductivity of a spin-polarized electron gas differs from that of an unpolarized electron gas, even in the absence of spin-orbit interaction. Magnetic fields are not required for the generation of these spin-polarized current pulses, although they can help align the polarization of sequential pulses along the same axis.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.96.026602