Evidence of a transition from nonlinear to linear screening of a two-dimensional electron system detected by photoluminescence spectroscopy

M. Yamaguchi, S. Nomura, T. Maruyama, S. Miyashita, Y. Hirayama, H. Tamura, T. Akazaki

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We clearly identify single-electron-localization (SEL), nonlinear screening (NLS), and linear screening (LS) regimes of gate induced electrons in a GaAs quantum well from photoluminescence spectra and intergate capacitance. Neutral and charged excitons observed in the SEL regime rapidly lose their oscillator strength when electron puddles are formed, which mark the onset of NLS. A further increase in the density of the electrons induces the transition from the NLS to LS, where the emission of a charged exciton changes to the recombination of two-dimensional electron gas and a hole.

Original languageEnglish
Article number207401
JournalPhysical review letters
Volume101
Issue number20
DOIs
Publication statusPublished - 2008 Nov 11

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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