Charge and spin dynamics in a two dimensional electron gas

Details Charge and spin dynamics in a two dimensional electron gas Charge and spin dynamics in a two dimensional electron gas

2006-10-27

arxiv.org/abs/cond-mat/0610783v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1088/0953-8984/19/29/295206

A number of time resolved optical experiments probing and controlling the spin and charge dynamics of the high mobility two-dimensional electron gas in a GaAs/AlGaAs heterojunction are discussed. These include time resolved reflectivity, luminescence, transient grating, magneto-optical Kerr effect, and electro-optical Kerr effect experiments. The optical experiments provide information on the carrier lifetimes and spin dephasing times, as well as on the carrier diffusion coefficient which directly gives the charge mobility. A combination of the two types of Kerr experiments, shows to be useful in extracting both the carrier lifetimes and spin dephasing times in a single experiment.

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