Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-04-04
Physics
Condensed Matter
Other Condensed Matter
5 pages, 4 figures in PostScript format
Scientific paper
10.1103/PhysRevLett.99.187401
The carrier spin coherence in a p-doped GaAs/(Al,Ga)As quantum well with a diluted hole gas has been studied by picosecond pump-probe Kerr rotation with an in-plane magnetic field. For resonant optical excitation of the positively charged exciton the spin precession shows two types of oscillations. Fast oscillating electron spin beats decay with the radiative lifetime of the charged exciton of 50 ps. Long lived spin coherence of the holes with dephasing times up to 650 ps. The spin dephasing time as well as the in-plane hole g factor show strong temperature dependence, underlining the importance of hole localization at cryogenic temperatures.
Bayer Manfred
Greilich Alex
Misiewicz Jan
Reuter Dennis
Syperek M.
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