Kohda, M. and Altmann, P. and Schuh, D. and Ganichev, S. D. and Wegscheider, W. and Salis, G. (2015) All-optical evaluation of spin-orbit interaction based on diffusive spin motion in a two-dimensional electron gas. APPLIED PHYSICS LETTERS, 107 (17): 172402. ISSN 0003-6951, 1077-3118
Full text not available from this repository.Abstract
A method is presented that enables the measurement of spin-orbit coefficients in a diffusive two-dimensional electron gas without the need for processing the sample structure, applying electrical currents or resolving the spatial pattern of the spin mode. It is based on the dependence of the average electron velocity on the spatial distance between local excitation and detection of spin polarization, resulting in a variation of spin precession frequency that in an external magnetic field is linear in the spatial separation. By scanning the relative positions of the exciting and probing spots in a time-resolved Kerr rotation microscope, frequency gradients along the [100] and [010] crystal axes of GaAs/AlGaAs QWs are measured to obtain the Rashba and Dresselhaus spin-orbit coefficients, alpha and beta. This simple method can be applied in a variety of materials with electron diffusion for evaluating spin-orbit coefficients. (C) 2015 AIP Publishing LLC.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MAGNETIC-FIELDS; SEMICONDUCTORS; HELIX; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 May 2019 12:16 |
| Last Modified: | 09 May 2019 12:16 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4595 |
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