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

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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.",

author = "Ashkinadze, {B. M.} and E. Linder and E. Cohen and Rudenkov, {V. V.} and Christianen, {P. C.M.} and Maan, {J. C.} and Pfeiffer, {L. N.}",

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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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