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Detection of Spin-Flip Relaxation Using Quantum Point Contacts

B. W. Alphenaar, H. O. Müller, and K. Tsukagoshi
Hitachi Cambridge Laboratory, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, UK

Abstract

            We measure the in uence of spin- ip relaxation on the inter-Landau level scattering in a quantum Hall conductor. The scattering rate increases sharply when hot electrons injected into the spin-down Landau level are able to spin ip and relax into the spin-up Landau level. Spin- ip relaxation provides energy for inelastic scattering at the sample edge. This is important for understanding the anomalous bias dependence observed between spin-resolved longitudinal resistance peaks.

B. W. Alphenaar, H. O. Müller, and K. Tsukagoshi, "Detection of Spin-Flip Relaxation Using Quantum Point Contacts," Physical Review Letters 81 (25), 5628-5631 (December 1998)

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