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Excitonic and free-carrier recombination of a two-dimensional electron gas in high magnetic fields

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Excitonic and free-carrier recombination of a two-dimensional electron gas in high magnetic fields. / Hayne, M ; Jones, Christopher L ; Bogaerts, Ria et al.
In: Physica B: Condensed Matter, Vol. 256, 12.1998, p. 327-330.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Hayne, M, Jones, CL, Bogaerts, R, Usher, A, Herlach, F, Moshchalkov, VV & Henini, M 1998, 'Excitonic and free-carrier recombination of a two-dimensional electron gas in high magnetic fields', Physica B: Condensed Matter, vol. 256, pp. 327-330. https://doi.org/10.1016/S0921-4526(98)00545-6

APA

Hayne, M., Jones, C. L., Bogaerts, R., Usher, A., Herlach, F., Moshchalkov, V. V., & Henini, M. (1998). Excitonic and free-carrier recombination of a two-dimensional electron gas in high magnetic fields. Physica B: Condensed Matter, 256, 327-330. https://doi.org/10.1016/S0921-4526(98)00545-6

Vancouver

Hayne M, Jones CL, Bogaerts R, Usher A, Herlach F, Moshchalkov VV et al. Excitonic and free-carrier recombination of a two-dimensional electron gas in high magnetic fields. Physica B: Condensed Matter. 1998 Dec;256:327-330. doi: 10.1016/S0921-4526(98)00545-6

Author

Hayne, M ; Jones, Christopher L ; Bogaerts, Ria et al. / Excitonic and free-carrier recombination of a two-dimensional electron gas in high magnetic fields. In: Physica B: Condensed Matter. 1998 ; Vol. 256. pp. 327-330.

Bibtex

@article{61b4bd39ac164cfdac0b225205d844b2,
title = "Excitonic and free-carrier recombination of a two-dimensional electron gas in high magnetic fields",
abstract = "We have studied the low temperature photoluminescence (PL) of the two-dimensional electron gas in a 100 Angstrom quantum well at fields up to 50 T over four orders of magnitude of laser power. At our highest laser powers we observe excitonic recombination via neutral and negatively charged (X-) excitons, and determine the X- binding energy to fields of 50 T. The binding energies of both singlet and triplet states increase monotonically with field above 15 T. At lower laser powers, in which recombination from the second Landau level is observed at fields up to 2.5 T, a splitting appears at high fields (>10 T) due to the recombination from the singlet and triplet states of X-. These data are inconsistent with a universal transition from free-carrier to excitonic recombination at Landau-level filling factor v=2, but imply that the onset of excitonic recombination is dependent on the illumination conditions.",
keywords = "photoluminescence, 2DEGs, negatively charged excitons, pulsed fields, GAAS QUANTUM-WELLS",
author = "M Hayne and Jones, {Christopher L} and Ria Bogaerts and Alan Usher and Fritz Herlach and Moshchalkov, {Victor V} and Mohamed Henini",
year = "1998",
month = dec,
doi = "10.1016/S0921-4526(98)00545-6",
language = "English",
volume = "256",
pages = "327--330",
journal = "Physica B: Condensed Matter",
issn = "0921-4526",
publisher = "ELSEVIER SCIENCE BV",

}

RIS

TY - JOUR

T1 - Excitonic and free-carrier recombination of a two-dimensional electron gas in high magnetic fields

AU - Hayne, M

AU - Jones, Christopher L

AU - Bogaerts, Ria

AU - Usher, Alan

AU - Herlach, Fritz

AU - Moshchalkov, Victor V

AU - Henini, Mohamed

PY - 1998/12

Y1 - 1998/12

N2 - We have studied the low temperature photoluminescence (PL) of the two-dimensional electron gas in a 100 Angstrom quantum well at fields up to 50 T over four orders of magnitude of laser power. At our highest laser powers we observe excitonic recombination via neutral and negatively charged (X-) excitons, and determine the X- binding energy to fields of 50 T. The binding energies of both singlet and triplet states increase monotonically with field above 15 T. At lower laser powers, in which recombination from the second Landau level is observed at fields up to 2.5 T, a splitting appears at high fields (>10 T) due to the recombination from the singlet and triplet states of X-. These data are inconsistent with a universal transition from free-carrier to excitonic recombination at Landau-level filling factor v=2, but imply that the onset of excitonic recombination is dependent on the illumination conditions.

AB - We have studied the low temperature photoluminescence (PL) of the two-dimensional electron gas in a 100 Angstrom quantum well at fields up to 50 T over four orders of magnitude of laser power. At our highest laser powers we observe excitonic recombination via neutral and negatively charged (X-) excitons, and determine the X- binding energy to fields of 50 T. The binding energies of both singlet and triplet states increase monotonically with field above 15 T. At lower laser powers, in which recombination from the second Landau level is observed at fields up to 2.5 T, a splitting appears at high fields (>10 T) due to the recombination from the singlet and triplet states of X-. These data are inconsistent with a universal transition from free-carrier to excitonic recombination at Landau-level filling factor v=2, but imply that the onset of excitonic recombination is dependent on the illumination conditions.

KW - photoluminescence

KW - 2DEGs

KW - negatively charged excitons

KW - pulsed fields

KW - GAAS QUANTUM-WELLS

U2 - 10.1016/S0921-4526(98)00545-6

DO - 10.1016/S0921-4526(98)00545-6

M3 - Journal article

VL - 256

SP - 327

EP - 330

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

ER -