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arXiv · 0809.3338

Spin noise spectroscopy in GaAs (110) quantum wells: Access to intrinsic spin lifetimes and equilibrium electron dynamics

Georg M. Müller·Michael Römer·Dieter Schuh·Werner Wegscheider·Jens Hübner·Michael Oestreich
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Abstract

In this letter, the first spin noise spectroscopy measurements in semiconductor systems of reduced effective dimensionality are reported. The non-demolition measurement technique gives access to the otherwise concealed intrinsic, low temperature electron spin relaxation time of n-doped GaAs (110) quantum wells and to the corresponding low temperature anisotropic spin relaxation. The Brownian motion of the electrons within the spin noise probe laser spot becomes manifest in a modification of the spin noise line width. Thereby, the spatially resolved observation of the stochastic spin polarization uniquely allows to study electron dynamics at equilibrium conditions with a vanishing total momentum of the electron system.

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Georg M. Müller, Michael Römer, Dieter Schuh, Werner Wegscheider, Jens Hübner, Michael Oestreich. 2008-09-19. Spin noise spectroscopy in GaAs (110) quantum wells: Access to intrinsic spin lifetimes and equilibrium electron dynamics. https://doi.org/10.1103/physrevlett.101.206601

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