Exciton to two-dimensional electron-hole photoluminescence transitions driven by the quantum Hall effect in photoexcited heterojunctions

B. M. Ashkinadze; E. Linder; E. Cohen; V. V. Rudenkov; P. C.M. Christianen; J. C. Maan; L. N. Pfeiffer

doi:10.1103/PhysRevB.72.075332

Exciton to two-dimensional electron-hole photoluminescence transitions driven by the quantum Hall effect in photoexcited heterojunctions

B. M. Ashkinadze
, E. Linder
, E. Cohen
, V. V. Rudenkov
, P. C.M. Christianen
, J. C. Maan
, L. N. Pfeiffer

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

A comprehensive experimental study of the photoluminescence (PL) spectral evolution under a magnetic field (B≤25T) applied perpendicularly to a high-mobility two-dimensional electron gas (2DEG), is performed on modulation-doped GaAs/AlGaAs heterojunctions at TL=0.3K. The abrupt transfer of the free exciton to hole-2DEG PL occurring at integer and fractional filling factors is analyzed in a phenomenological model, wherein free excitons photogenerated in the GaAs layer dissociate into a 2D electron and 3D hole near the 2D-electron channel. Such magnetic field induced exciton-(2De-h) transitions are able to explain the remarkable strong PL anomalies in single hetrojunctions as compared to those observed in modulation-doped quantum wells.

Original language	English (US)
Article number	075332
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.72.075332
State	Published - Aug 15 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.72.075332

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Ashkinadze, B. M., Linder, E., Cohen, E., Rudenkov, V. V., Christianen, P. C. M., Maan, J. C., & Pfeiffer, L. N. (2005). Exciton to two-dimensional electron-hole photoluminescence transitions driven by the quantum Hall effect in photoexcited heterojunctions. Physical Review B - Condensed Matter and Materials Physics, 72(7), Article 075332. https://doi.org/10.1103/PhysRevB.72.075332

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title = "Exciton to two-dimensional electron-hole photoluminescence transitions driven by the quantum Hall effect in photoexcited heterojunctions",

abstract = "A comprehensive experimental study of the photoluminescence (PL) spectral evolution under a magnetic field (B≤25T) applied perpendicularly to a high-mobility two-dimensional electron gas (2DEG), is performed on modulation-doped GaAs/AlGaAs heterojunctions at TL=0.3K. The abrupt transfer of the free exciton to hole-2DEG PL occurring at integer and fractional filling factors is analyzed in a phenomenological model, wherein free excitons photogenerated in the GaAs layer dissociate into a 2D electron and 3D hole near the 2D-electron channel. Such magnetic field induced exciton-(2De-h) transitions are able to explain the remarkable strong PL anomalies in single hetrojunctions as compared to those observed in modulation-doped quantum wells.",

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AU - Ashkinadze, B. M.

AU - Linder, E.

AU - Cohen, E.

AU - Rudenkov, V. V.

AU - Christianen, P. C.M.

AU - Maan, J. C.

AU - Pfeiffer, L. N.

PY - 2005/8/15

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AB - A comprehensive experimental study of the photoluminescence (PL) spectral evolution under a magnetic field (B≤25T) applied perpendicularly to a high-mobility two-dimensional electron gas (2DEG), is performed on modulation-doped GaAs/AlGaAs heterojunctions at TL=0.3K. The abrupt transfer of the free exciton to hole-2DEG PL occurring at integer and fractional filling factors is analyzed in a phenomenological model, wherein free excitons photogenerated in the GaAs layer dissociate into a 2D electron and 3D hole near the 2D-electron channel. Such magnetic field induced exciton-(2De-h) transitions are able to explain the remarkable strong PL anomalies in single hetrojunctions as compared to those observed in modulation-doped quantum wells.

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Exciton to two-dimensional electron-hole photoluminescence transitions driven by the quantum Hall effect in photoexcited heterojunctions

Abstract

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