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- W2072918612 abstract "Abstract We measured the photoluminescence (PL) of a GaAs quantum well (QW) with a lateral potential modulation by the front-gate bias while changing both the electron density and electric field at low temperature. Near the onset of the two-dimensional electron gas, we observed an anomalous enhancement of PL intensity of the neutral exciton X 0 accompanied by a decrease in the intensity of the charged exciton X - . The sample was a 20-nm GaAs back-gate undoped QW with semi-transparent square-mesh surface gates. By comparing the results with those for a flat transparent surface gate sample we discuss the origin of this anomalous phenomenon. We present a possible explanation for this phenomenon, which is attributed to lateral drift motion of the X 0 in a laterally modulated exciton potential." @default.
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- W2072918612 date "2010-02-01" @default.
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- W2072918612 title "Photoluminescence spectra of gated undoped quantum well with lateral potential modulation in low electron density" @default.
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- W2072918612 doi "https://doi.org/10.1016/j.physe.2009.10.042" @default.
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