Spin coherence of the two-dimensional electron gas in a GaAs quantum well
The coherent spin dynamics of the quasi-two-dimensional electron gas in a GaAs quantum well is experimentally investigated using the time-resolved spin Kerr effect in an optical cryostat with a split coil inducing magnetic fields of up to 6 T at a temperature of about 2 K. The electron spin dephasing times and degree of anisotropy of the spin relaxation of electrons are measured in zero magnetic field at different electron densities. The dependence of the spin-orbit splitting on the electron-gas density is established. In the integral quantum-Hall-effect mode, the unsteady behavior of the spin dephasing time of 2D electrons of the lower Landau spin sublevel near the odd occupation factor ν = 3 is found. The experimentally observed unsteady behavior of the spin dephasing time can be explained in terms of new-type cyclotron modes that occur in a liquid spin texture.
- OSTI ID:
- 22470132
- Journal Information:
- Semiconductors, Journal Name: Semiconductors Journal Issue: 1 Vol. 49; ISSN SMICES; ISSN 1063-7826
- Country of Publication:
- United States
- Language:
- English
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