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Controlling hole spin dynamics in two‐dimensional hole systems at low temperatures
Kugler, M., Korn, Tobias, Hirmer, Michael, Schuh, Dieter, Wegscheider, Werner and Schüller, Christian (2011) Controlling hole spin dynamics in two‐dimensional hole systems at low temperatures. In: PHYSICS OF SEMICONDUCTORS: 30th International Conference on the Physics of Semiconductors, 25–30 July 2010, Seoul, (Korea).Date of publication of this fulltext: 14 May 2012 08:46
Conference or workshop item
DOI to cite this document: 10.5283/epub.24249
Abstract
With the recent discovery of very long hole spin decoherence times in GaAs/AlGaAs heterostructures of more than 70 ns in two-dimensional hole systems, using the hole spin as a viable alternative to electron spins in spintronic applications seems possible. Furthermore, as the hyperfine interaction with the nuclear spins is likely to be the limiting factor for electron spin lifetimes in zero ...
With the recent discovery of very long hole spin decoherence times in GaAs/AlGaAs heterostructures of more than 70 ns
in two-dimensional hole systems, using the hole spin as a viable alternative to electron spins in spintronic applications seems
possible. Furthermore, as the hyperfine interaction with the nuclear spins is likely to be the limiting factor for electron spin
lifetimes in zero dimensions, holes with their suppressed Fermi contact hyperfine interaction due to their p-like nature should
be able to show even longer lifetimes than electrons. For spintronic applications, electric-field control of hole spin dynamics
is desirable.
Here, we report on time-resolved Kerr rotation and resonant spin amplification measurements on a two-dimensional hole
system in a p-doped GaAs/AlGaAs heterostructure. Via a semitransparent gate, we tune the charge density within the sample.
We are able to observe a change in the hole g factor, as well as in the hole spin dephasing time at high magnetic fields.
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| Item type | Conference or workshop item (UNSPECIFIED) | ||||||
| Journal or Publication Title | AIP Conf. Proc. | ||||||
| Publisher: | American Institute of Physics | ||||||
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| Volume: | 1399 | ||||||
| Page Range: | pp. 729-730 | ||||||
| Date | 2011 | ||||||
| Additional Information (public) | AIP Conf. Proc. 1399 | ||||||
| Institutions | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider | ||||||
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| Classification |
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| Keywords | Optical orientation, hole spin dynamics, GaAs heterostructures | ||||||
| Dewey Decimal Classification | 500 Science > 530 Physics | ||||||
| Status | Published | ||||||
| Refereed | Yes, this version has been refereed | ||||||
| Created at the University of Regensburg | Yes | ||||||
| URN of the UB Regensburg | urn:nbn:de:bvb:355-epub-242498 | ||||||
| Item ID | 24249 |
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