Spin dynamics of electrons in the first excited subband of a high-mobility low-density 2D electron system

Details Spin dynamics of electrons in the first excited subband of a high-mobility low-density 2D electron system Spin dynamics of electrons in the first excited subband of a high-mobility low-density 2D electron system

2009-02-23

arxiv.org/abs/0902.3875v1

Physics

Condensed Matter

Materials Science

Scientific paper

We report on time-resolved Kerr rotation measurements of spin coherence of electrons in the first excited subband of a high-mobility low-density two-dimensional electron system in a GaAs/Al0.35Ga0.65As heterostructure. While the transverse spin lifetime (T2*) of electrons decreases monotonically with increasing magnetic field, it has a non-monotonic dependence on the temperature, with a peak value of 596 ps at 36 K, indicating the effect of inter-subband electron-electron scattering on the electron spin relaxation. The spin lifetime may be long enough for potential device application with electrons in excited subbands.

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