Coherent spin dynamics in quantum wells in quantizing magnetic field

Details Coherent spin dynamics in quantum wells in quantizing magnetic field Coherent spin dynamics in quantum wells in quantizing magnetic field

2006-09-20

arxiv.org/abs/cond-mat/0609522v1

Phys. Rev. B 73, 205335 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

13 pages, 4 figures

Scientific paper

10.1103/PhysRevB.73.205335

We investigate theoretically the coherent longitudinal and transversal spin relaxation of photoexcited electrons in quantum wells in quantized magnetic fields. We find the relaxation time for typical quantum well parameters between 100 and 1000 ps. For a realistic random potential the relaxation process depends on the electron energy and g-factor, demonstrating oscillations in the spin polarization accompanying the spin relaxation. The dependence of spin relaxation on applied field, and thus on the corresponding "magnetic" length, can be used to characterize the spatial scale of disorder in quantum wells.

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