Frolov, S. M. and Venkatesan, A. and Yu, W. and Folk, J. A. and Wegscheider, Werner (2009) Electrical Generation of Pure Spin Currents in a Two-Dimensional Electron Gas. PHYSICAL REVIEW LETTERS, 102 (11): 116802. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
Pure spin currents are generated and detected in micron-wide channels of a GaAs two-dimensional electron gas, using quantum point contacts in an in-plane magnetic field as injectors and detectors. The enhanced sensitivity to spin transport offered by a nonlocal measurement geometry enables accurate spin current measurements in this widely studied physical system. The polarization of the contacts is used to extract the quantum point contact g factor and provides a test for spontaneous polarization at 0.7 structure. The spin relaxation length in the channel is 30-50 mu m over the magnetic field range 3-10 T, much longer than has been reported in GaAs two-dimensional electron gases but shorter than that expected from Dyakonov-Perel relaxation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ROOM-TEMPERATURE; TRANSPORT; INJECTION; SEMICONDUCTORS; ACCUMULATION; CONDUCTANCE; FIELDS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Sep 2020 07:08 |
| Last Modified: | 21 Sep 2020 07:08 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29265 |
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