Effect of illumination on quantum lifetime in GaAs quantum wells

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish (US)
Article number195403
JournalPhysical Review B
Volume98
Issue number19
DOIs
StatePublished - Nov 5 2018

Fingerprint

Semiconductor quantum wells
Lighting
illumination
quantum wells
life (durability)
Microwaves
microwaves
Galvanomagnetic effects
Two dimensional electron gas
Carrier mobility
carrier mobility
Carrier concentration
electron gas
Screening
screening
Doping (additives)
Magnetic fields
oscillations
causes
magnetic fields

Cite this

Fu, X., Riedl, A., Borisov, M., Zudov, M. A., Watson, J. D., Gardner, G., ... West, K. W. (2018). Effect of illumination on quantum lifetime in GaAs quantum wells. Physical Review B, 98(19), [195403]. https://doi.org/10.1103/PhysRevB.98.195403

Effect of illumination on quantum lifetime in GaAs quantum wells. / Fu, X.; Riedl, A.; Borisov, M.; Zudov, M. A.; Watson, J. D.; Gardner, G.; Manfra, M. J.; Baldwin, K. W.; Pfeiffer, L. N.; West, K. W.

In: Physical Review B, Vol. 98, No. 19, 195403, 05.11.2018.

Research output: Contribution to journalArticle

Fu, X, Riedl, A, Borisov, M, Zudov, MA, Watson, JD, Gardner, G, Manfra, MJ, Baldwin, KW, Pfeiffer, LN & West, KW 2018, 'Effect of illumination on quantum lifetime in GaAs quantum wells', Physical Review B, vol. 98, no. 19, 195403. https://doi.org/10.1103/PhysRevB.98.195403
Fu, X. ; Riedl, A. ; Borisov, M. ; Zudov, M. A. ; Watson, J. D. ; Gardner, G. ; Manfra, M. J. ; Baldwin, K. W. ; Pfeiffer, L. N. ; West, K. W. / Effect of illumination on quantum lifetime in GaAs quantum wells. In: Physical Review B. 2018 ; Vol. 98, No. 19.
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