Pure spin currents induced by spin-dependent scattering processes in SiGe quantum well structures

Ganichev, S. D., Danilov, S. N., Bel'kov, V. V., Giglberger, S., Tarasenko, S. A., Ivchenko, E. L., Weiss, D., Jantsch, W., Schäffler, F., Gruber, D. and Prettl, W. (2007) Pure spin currents induced by spin-dependent scattering processes in SiGe quantum well structures. Physical Review B (Condensed Matter and Materials Physics), 75 15: 155317-1-155317-6. doi:10.1103/PhysRevB.75.155317

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Author Ganichev, S. D.
Danilov, S. N.
Bel'kov, V. V.
Giglberger, S.
Tarasenko, S. A.
Ivchenko, E. L.
Weiss, D.
Jantsch, W.
Schäffler, F.
Gruber, D.
Prettl, W.
Title Pure spin currents induced by spin-dependent scattering processes in SiGe quantum well structures
Journal name Physical Review B (Condensed Matter and Materials Physics)   Check publisher's open access policy
ISSN 1098-0121
0163-1829
1550-235X
Publication date 2007-04-01
Year available 2007
Sub-type Article (original research)
DOI 10.1103/PhysRevB.75.155317
Open Access Status File (Publisher version)
Volume 75
Issue 15
Start page 155317-1
End page 155317-6
Total pages 6
Place of publication New York
Publisher American Physical Society
Language eng
Subject 020404 Electronic and Magnetic Properties of Condensed Matter; Superconductivity
Abstract We show that spin-dependent electron-phonon interaction in the energy relaxation of a two-dimensional electron gas results in equal and oppositely directed currents in the spin-up and spin-down subbands yielding a pure spin current. In our experiments on SiGe heterostructures the pure spin current is converted into an electric current applying a magnetic field that lifts the cancellation of the two partial charge flows. A microscopic theory of this effect, taking account of the asymmetry of the relaxation process, is developed and is in good agreement with the experimental data
Keyword Ge-Si alloys
Semiconductor materials
Semiconductor quantum wells
Electron-phonon interactions
Two-dimensional electron gas
Spin polarised transport
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes Article No. 155317

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Mathematics and Physics
 
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Created: Fri, 13 Feb 2009, 01:39:29 EST by Mary-Anne Marrington on behalf of School of Mathematics & Physics