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arXiv · 0902.3875

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

Haihui Luo·Xuan Qian·Xuezhong Ruan·Yang Ji
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Abstract

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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Haihui Luo, Xuan Qian, Xuezhong Ruan, Yang Ji. 2009-02-23. Spin dynamics of electrons in the first excited subband of a high-mobility low-density 2D electron system. https://doi.org/10.1103/physrevb.80.193301

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