X. Fu, A. Riedl, M. Borisov, M. A. Zudov, J. D. Watson, G. Gardner, M. J. Manfra, K. W. Baldwin, L. N. Pfeiffer, K. W. West
Published 2019-04-05Version 1
Low-temperature illumination of a two-dimensional electron gas in GaAs quantum wells is known to greatly improve the quality of high-field magnetotransport. The improvement is known to occur even when the carrier density and mobility remain unchanged, but what exactly causes it remains unclear. Here, we investigate the effect of illumination on microwave photoresistance in low magnetic fields. We find that the amplitude of microwave-induced resistance oscillations grows dramatically after illumination. Dingle analysis reveals that this growth reflects a substantial increase in the single-particle (quantum) lifetime, which likely originates from the light-induced redistribution of charge enhancing the screening capability of the doping layers.
Journal: Phys. Rev. B 98, 195403 (2018)
Electron density effect on spin-orbit interaction in [001] GaAs quantum wells
Exciton Beats in GaAs Quantum Wells: Bosonic Representation and Collective Effects
Tuning of structure inversion asymmetry by the $δ$-doping position in (001)-grown GaAs quantum wells
![QR code for arXiv:1904.03146 [cond-mat.mes-hall]](http://oss.arxitics.com/images/favicon.svg)