Photoluminescence spectral evolution from 2DEG-free hole to charged excitons in modulation-doped GaAs/AlGaAs quantum wells

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

doi:10.1002/pssc.200304027

Photoluminescence spectral evolution from 2DEG-free hole to charged excitons in modulation-doped GaAs/AlGaAs quantum wells

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

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

1 Scopus citations

Abstract

We report on a detailed study of the photoluminescence (PL) in high quality GaAs/AlGaAs quantum wells containing a two-dimensional electron gas. The 2DEG density was varied by optical depletion (with He-Ne laser illumination) in the range of n_2D = (7-3) × 10¹⁰ cm^-2. The n_2D-dependent PL spectra were studied under a perpendicularly applied magnetic field B < 12 T at T_L = 0.3 and 1.5 K. The evolution from free hole-2DEG to charged exciton PL with decreasing n_2D or with increasing magnetic field is attributed to the appearance of regions containing localized electrons as the filling factor decreases below v = 0.40.3. This results in simultaneous PL of the free hole-2DEG originating from electron puddles and of charged exciton from regions with localized electrons.

Original language	English (US)
Pages (from-to)	510-513
Number of pages	4
Journal	Physica Status Solidi C: Conferences
Volume	1
Issue number	3
DOIs	https://doi.org/10.1002/pssc.200304027
State	Published - 2004
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1002/pssc.200304027

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title = "Photoluminescence spectral evolution from 2DEG-free hole to charged excitons in modulation-doped GaAs/AlGaAs quantum wells",

abstract = "We report on a detailed study of the photoluminescence (PL) in high quality GaAs/AlGaAs quantum wells containing a two-dimensional electron gas. The 2DEG density was varied by optical depletion (with He-Ne laser illumination) in the range of n2D = (7-3) × 1010 cm-2. The n2D-dependent PL spectra were studied under a perpendicularly applied magnetic field B < 12 T at TL = 0.3 and 1.5 K. The evolution from free hole-2DEG to charged exciton PL with decreasing n2D or with increasing magnetic field is attributed to the appearance of regions containing localized electrons as the filling factor decreases below v = 0.40.3. This results in simultaneous PL of the free hole-2DEG originating from electron puddles and of charged exciton from regions with localized electrons.",

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

year = "2004",

doi = "10.1002/pssc.200304027",

language = "English (US)",

volume = "1",

pages = "510--513",

journal = "Physica Status Solidi C: Conferences",

issn = "1610-1634",

publisher = "Wiley-VCH Verlag",

number = "3",

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TY - JOUR

T1 - Photoluminescence spectral evolution from 2DEG-free hole to charged excitons in modulation-doped GaAs/AlGaAs quantum wells

AU - Ashkinadze, B. M.

AU - Rudenkov, V. V.

AU - Christianen, P. C.M.

AU - Maan, J. C.

AU - Linder, E.

AU - Cohen, E.

AU - Pfeiffer, L. N.

PY - 2004

Y1 - 2004

N2 - We report on a detailed study of the photoluminescence (PL) in high quality GaAs/AlGaAs quantum wells containing a two-dimensional electron gas. The 2DEG density was varied by optical depletion (with He-Ne laser illumination) in the range of n2D = (7-3) × 1010 cm-2. The n2D-dependent PL spectra were studied under a perpendicularly applied magnetic field B < 12 T at TL = 0.3 and 1.5 K. The evolution from free hole-2DEG to charged exciton PL with decreasing n2D or with increasing magnetic field is attributed to the appearance of regions containing localized electrons as the filling factor decreases below v = 0.40.3. This results in simultaneous PL of the free hole-2DEG originating from electron puddles and of charged exciton from regions with localized electrons.

AB - We report on a detailed study of the photoluminescence (PL) in high quality GaAs/AlGaAs quantum wells containing a two-dimensional electron gas. The 2DEG density was varied by optical depletion (with He-Ne laser illumination) in the range of n2D = (7-3) × 1010 cm-2. The n2D-dependent PL spectra were studied under a perpendicularly applied magnetic field B < 12 T at TL = 0.3 and 1.5 K. The evolution from free hole-2DEG to charged exciton PL with decreasing n2D or with increasing magnetic field is attributed to the appearance of regions containing localized electrons as the filling factor decreases below v = 0.40.3. This results in simultaneous PL of the free hole-2DEG originating from electron puddles and of charged exciton from regions with localized electrons.

UR - https://www.scopus.com/pages/publications/2342454481

UR - https://www.scopus.com/pages/publications/2342454481#tab=citedBy

U2 - 10.1002/pssc.200304027

DO - 10.1002/pssc.200304027

M3 - Article

AN - SCOPUS:2342454481

SN - 1610-1634

VL - 1

SP - 510

EP - 513

JO - Physica Status Solidi C: Conferences

JF - Physica Status Solidi C: Conferences

IS - 3

ER -

Photoluminescence spectral evolution from 2DEG-free hole to charged excitons in modulation-doped GaAs/AlGaAs quantum wells

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