Dimensionally constrained D'yakonov–Perel' spin relaxation in n-InGaAs channels: transition from 2D to 1D

doi:10.1088/1367-2630/9/9/342

Dimensionally constrained D'yakonov–Perel' spin relaxation in n-InGaAs channels: transition from 2D to 1D

A W Holleitner et al 2007 New J. Phys. 9 342 doi: 10.1088/1367-2630/9/9/342

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A W Holleitner¹, V Sih², R C Myers², A C Gossard² and D D Awschalom^2,3
¹ Department für Physik and Center for NanoScience (CeNS), Ludwig-Maximilians-University, 80539 Munich, Germany
² Center for Spintronics and Quantum Computation, University of California, Santa Barbara, CA 93106, USA
³ Author to whom any correspondence should be addressed.
E-mail: awsch@physics.ucsb.edu

Part of Focus on Spintronics in Reduced Dimensions

Abstract. We investigate both the spin dynamics and the magnetotransport properties of two-dimensional (2D) n-InGaAs channels as a function of the channel width. We find that the electron spin scattering in the channels is limited by a dimensionally constrained D'yakonov–Perel' mechanism, while the magnetotransport reveals purely 2D behaviour. For submicron channels the spin relaxation times increase for decreasing widths, while the magnetotransport data exhibit no band bending effects for the investigated samples. Temperature and photon energy dependent measurements rule out dissipative effects and further corroborate the experimental observation of a dimensionally constrained spin relaxation.

Received 30 March 2007
Published 28 September 2007

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Dimensionally constrained D'yakonov–Perel' spin relaxation in n-InGaAs channels: transition from 2D to 1D

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