Modulation of the dephasing time for a magnetoplasma in a quantum well

Details Modulation of the dephasing time for a magnetoplasma in a quantum well Modulation of the dephasing time for a magnetoplasma in a quantum well

1998-10-03

arxiv.org/abs/cond-mat/9810029v1

Solid State Commun. 108, 809 (1998)

Physics

Condensed Matter

RevTex, 3 figures, to be published in Solid. Stat. Commun

Scientific paper

10.1016/S0038-1098(98)00512-2

We investigate the femtosecond kinetics of optically excited 2D magneto-plasma. We calculate the femtosecond dephasing and relaxation kinetics of the laser pulse excited magneto-plasma due to bare Coulomb potential scattering, because screening is under these conditions of minor importance. By taking into account four Landau subbands in both the conduction band and the valence band, we are now able to extend our earlier study [Phys. Rev. B {\bf 58}, 1998,in print (see also cond-mat/9808073] to lower magnetic fields. We can also fix the magnetic field and change the detuning to further investigate the carrier density-dependence of the dephasing time. For both cases, we predict strong modulation in the dephasing time.

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