EQUILIBRATION LENGTH OF ELECTRONS IN SPIN-POLARIZED EDGE CHANNELS

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关键词: QUANTUM HALL REGIME;    GAAS-ALXGA1-XAS HETEROSTRUCTURES;    STATES;    CONTACTS;    GAS;    HETEROJUNCTIONS;    BACKSCATTERING;    CONDUCTANCE;    RELAXATION;    RESONANCE;   

DOI  :  10.1103/PhysRevB.45.3932

来源: SCIE

【 摘 要 】

We investigate experimentally the mean free path of electrons injected selectively into the outer spin-polarized edge channel of the lowest Landau level. A simple model allows us to determine the characteristic length between two spin-flip scattering events directly from the measured resistance plateaus. Typical spin-flip equilibration lengths between 100-mu-m and 1 mm are found. The size of the observed equilibration lengths is interpreted in terms of the spin-orbit interaction, which also leads to a local g-factor enhancement at the edge.

【 授权许可】

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