Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2008-09-19
Phys. Rev. Lett. 101 (2008) 206601
Physics
Condensed Matter
Other Condensed Matter
Scientific paper
10.1103/PhysRevLett.101.206601
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.
Hübner Jens
Müller Georg M.
Oestreich Michael
Römer Michael
Schuh Dieter
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