Spontaneous Spin-Polarization of Ballistic Electrons in Single Mode Quantum Wires due to Spin-Splitting

Details Spontaneous Spin-Polarization of Ballistic Electrons in Single Mode Quantum Wires due to Spin-Splitting Spontaneous Spin-Polarization of Ballistic Electrons in Single Mode Quantum Wires due to Spin-Splitting

1993-04-10

arxiv.org/abs/cond-mat/9304021v1

Physics

Condensed Matter

9 pages, LaTeX and APS-RevteX, Rep.No. GF65,Figures from author

Scientific paper

10.1063/1.109425

We show that a quantum wire device with spin splitting can work as an active spin polarizer. Hot electrons in one `spin' subband (e.g. `spin-up') may pass such a device with weak electron pair scattering, while electrons in the opposite subband (`spin-down') may have high conversion probability into the `spin-up' subband, resulting in spin polarization of a hot electron beam. Under different circumstances a hot electron beam passing through a single mode quantum wire may induce a steady state magnetization of the background electron gas in a section of the wire weakly coupled to the environment.

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