Bel'kov, V. and Olbrich, Peter and Tarasenko, S. and Schuh, Dieter and Wegscheider, Werner and Korn, Tobias and Schüller, Christian and Weiss, Dieter and Prettl, Wilhelm and Ganichev, Sergey (2008) Symmetry and Spin Dephasing in (110)-Grown Quantum Wells. Physical Review Letters 100, p. 176806.
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Symmetry and spin dephasing in (110)-grown GaAs quantum wells (QWs) are investigated applying magnetic field induced photogalvanic effect and time-resolved Kerr rotation. We show that magnetic field induced photogalvanic effect provides a tool to probe the symmetry of (110)-grown quantum wells. The photocurrent is only observed for asymmetric structures but vanishes for symmetric QWs. Applying Kerr rotation we prove that in the latter case the spin relaxation time is maximal; therefore, these structures set the upper limit of spin dephasing in GaAs QWs. We also demonstrate that structure inversion asymmetry can be controllably tuned to zero by variation of delta-doping layer positions.
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev|
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Wilhelm Prettl
Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider
Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss
|Projects:||SFB 689: Spinphänomene in reduzierten Dimensionen|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||25 May 2009 13:19|
|Last Modified:||05 Aug 2009 13:57|