Korn, Tobias and Kugler, M. and Hirmer, Michael and Schuh, Dieter and Wegscheider, Werner and Schüller, Christian
Resonant spin amplification of hole spin dynamics in two‐dimensional hole systems: experiment and simulation.
In: PHYSICS OF SEMICONDUCTORS: 30th International Conference on the Physics of Semiconductors, 25–30 July 2010 , Seoul, (Korea) .
Spins in semiconductor structures may allow for the realization of scalable quantum bit arrays, an essential
component for quantum computation schemes. Specifically, hole spins may be more suited for this purpose than electron
spins, due to their strongly reduced interaction with lattice nuclei, which limits spin coherence for electrons in quantum dots.
Here, we present resonant spin amplification (RSA) measurements, performed on a p-modulation doped GaAs-based quantum
well at temperatures below 500 mK. The RSA traces have a peculiar, butterfly-like shape, which stems from the initialization
of a resident hole spin polarization by optical orientation. The combined dynamics of the optically oriented electron and hole
spins are well-described by a rate equation model, and by comparison of experiment and model, hole spin dephasing times of
more than 70 ns are extracted from the measured data.
|Item Type:||Conference or Workshop Item (UNSPECIFIED)|
|Additional information (public):||AIP Conf. Proc. 1399|
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
|Keywords:||Optical orientation, hole spin dynamics, GaAs heterostructures|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||14 May 2012 08:44|
|Last Modified:||14 May 2012 08:44|