Ganichev, Sergey D. and Bel'kov, Vasily V. and Tarasenko, Sergey A. and Danilov, Sergey N. and Giglberger, Stephan and Hoffmann, Christoph and Ivchenko, Eougenious L. and Weiss, Dieter and Wegscheider, Werner and Gerl, Christian and Schuh, Dieter and Stahl, Joachim and De Boeck, Jo and Borghs, Gustaaf and Prettl, Wilhelm (2006) Zero-bias spin separation. NATURE PHYSICS, 2 (9). pp. 609-613. ISSN 1745-2473,
Full text not available from this repository. (Request a copy)Abstract
The generation, manipulation and detection of spin-polarized electrons in low-dimensional semiconductors are at the heart of spintronics. Pure spin currents, that is, fluxes of magnetization without charge current, are quite attractive in this respect. A paradigmatic example is the spin Hall effect, where an electrical current drives a transverse spin current and causes a non-equilibrium spin accumulation observed near the sample boundary(1,2). Here we provide evidence for an another effect causing spin currents which is fundamentally different from the spin Hall effect. In contrast to the spin Hall effect, it does not require an electric current to flow: without bias the spin separation is achieved by spin-dependent scattering of electrons in media with suitable symmetry. We show, by free-carrier absorption of terahertz (THz) radiation, that spin currents flow in a wide range of temperatures. Moreover, the experimental results provide evidence that simple electron gas heating by any means is already sufficient to yield spin separation due to spin-dependent energy-relaxation processes.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM-WELLS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 Feb 2021 07:45 |
| Last Modified: | 03 Feb 2021 07:45 |
| URI: | https://pred.uni-regensburg.de/id/eprint/34130 |
Actions (login required)
 |
View Item |
