Phys. Rev. Lett. 100, 256601 (2008) [4 pages]Ultrafast Spin Dynamics Including Spin-Orbit Interaction in SemiconductorsReceived 2 January 2008; published 26 June 2008 This Letter presents a theoretical investigation of ultrafast spin-dependent carrier dynamics in semiconductors due to strong spin-orbit coupling using holes in bulk GaAs as a model system. By computing the microscopic carrier dynamics in the anisotropic hole-band structure including spin-orbit coupling, we obtain spin-relaxation times in quantitative agreement with measured hole-spin relaxation times [ Phys. Rev. Lett. 89 146601 (2002)]. We show that different optical techniques for the measurement of hole-spin dynamics yield different results, in contrast to the case of electron-spin dynamics. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.256601
DOI:
10.1103/PhysRevLett.100.256601
PACS:
72.25.Rb, 71.70.Ej, 72.25.Fe, 78.47.−p
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