Kugler, M. and Andlauer, T. and Korn, Tobias and Wagner, Christoph and Fehringer, S. and Schulz, Robert and Kubová, M. and Gerl, Christian and Schuh, Dieter and Wegscheider, Werner and Vogl, P. and Schüller, Christian
Gate control of low-temperature spin dynamics in two-dimensional hole systems.
Physical Review B (PRB) 80 (3), 035325.
Other URL: http://link.aps.org/doi/10.1103/PhysRevB.80.035325
We have investigated spin and carrier dynamics of resident holes in high-mobility two-dimensional hole systems in GaAs/Al0.3Ga0.7As single-quantum wells at temperatures down to 400 mK. Time-resolved Faraday and Kerr rotation as well as time-resolved photoluminescence spectroscopy are utilized in our study. We observe long-lived hole-spin dynamics that are strongly temperature dependent, indicating that in-plane localization is crucial for hole-spin coherence. By applying a gate voltage, we are able to tune the observed hole g factor by more than 50%. Calculations of the hole g tensor as a function of the applied bias show excellent agreement with our experimental findings.
|Date:||28 July 2009|
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller|
|Keywords:||aluminium compounds, Faraday effect, gallium arsenide, g-factor, III-V semiconductors, localised states, optical Kerr effect, photoluminescence, semiconductor quantum wells, spin dynamics, spin polarised transport, time resolved spectra, two-dimensional hole gas|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||25 Sep 2009 07:34|
|Last Modified:||20 Jul 2011 21:45|