Thermodynamics of free trions in mixed type GaAs/AlAs quantum wells

Arza Ron; H. W. Yoon; M. D. Sturge; A. Manassen; E. Cohen; L. N. Pfeiffer

doi:10.1016/0038-1098(95)00758-X

Thermodynamics of free trions in mixed type GaAs/AlAs quantum wells

Arza Ron, H. W. Yoon, M. D. Sturge, A. Manassen, E. Cohen, L. N. Pfeiffer

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

73 Scopus citations

Abstract

An emission line which depends on the simultaneous presence of excitons and ∼10¹⁰ cm^-2 photoexcited electrons in a 20nm quantum well is shown to be due to free negatively charged excitons ("trions"). We have measured the temperature dependence of the exciton and trion lifetimes and of the exciton/trion ratio, and demonstrate that the trion is a free particle analogous to the negative positronium ion. The binding energy is 1.3 meV and the lifetime is 1/4 of that of the exciton. Both lifetimes increase with temperature, as expected for a free particle. The intensity of the trion line relative to the exciton line is a good measure of the electron density.

Original language	English (US)
Pages (from-to)	741-745
Number of pages	5
Journal	Solid State Communications
Volume	97
Issue number	9
DOIs	https://doi.org/10.1016/0038-1098(95)00758-X
State	Published - Mar 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

Keywords

A: quantum wells, semiconductors
C: electron-electron interactions, optical properties
E: luminescence

Access to Document

10.1016/0038-1098(95)00758-X

Cite this

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title = "Thermodynamics of free trions in mixed type GaAs/AlAs quantum wells",

abstract = "An emission line which depends on the simultaneous presence of excitons and ∼1010 cm-2 photoexcited electrons in a 20nm quantum well is shown to be due to free negatively charged excitons ({"}trions{"}). We have measured the temperature dependence of the exciton and trion lifetimes and of the exciton/trion ratio, and demonstrate that the trion is a free particle analogous to the negative positronium ion. The binding energy is 1.3 meV and the lifetime is 1/4 of that of the exciton. Both lifetimes increase with temperature, as expected for a free particle. The intensity of the trion line relative to the exciton line is a good measure of the electron density.",

keywords = "A: quantum wells, semiconductors, C: electron-electron interactions, optical properties, E: luminescence",

author = "Arza Ron and Yoon, {H. W.} and Sturge, {M. D.} and A. Manassen and E. Cohen and Pfeiffer, {L. N.}",

year = "1996",

month = mar,

doi = "10.1016/0038-1098(95)00758-X",

language = "English (US)",

volume = "97",

pages = "741--745",

journal = "Solid State Communications",

issn = "0038-1098",

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TY - JOUR

T1 - Thermodynamics of free trions in mixed type GaAs/AlAs quantum wells

AU - Ron, Arza

AU - Yoon, H. W.

AU - Sturge, M. D.

AU - Manassen, A.

AU - Cohen, E.

AU - Pfeiffer, L. N.

PY - 1996/3

Y1 - 1996/3

N2 - An emission line which depends on the simultaneous presence of excitons and ∼1010 cm-2 photoexcited electrons in a 20nm quantum well is shown to be due to free negatively charged excitons ("trions"). We have measured the temperature dependence of the exciton and trion lifetimes and of the exciton/trion ratio, and demonstrate that the trion is a free particle analogous to the negative positronium ion. The binding energy is 1.3 meV and the lifetime is 1/4 of that of the exciton. Both lifetimes increase with temperature, as expected for a free particle. The intensity of the trion line relative to the exciton line is a good measure of the electron density.

AB - An emission line which depends on the simultaneous presence of excitons and ∼1010 cm-2 photoexcited electrons in a 20nm quantum well is shown to be due to free negatively charged excitons ("trions"). We have measured the temperature dependence of the exciton and trion lifetimes and of the exciton/trion ratio, and demonstrate that the trion is a free particle analogous to the negative positronium ion. The binding energy is 1.3 meV and the lifetime is 1/4 of that of the exciton. Both lifetimes increase with temperature, as expected for a free particle. The intensity of the trion line relative to the exciton line is a good measure of the electron density.

KW - A: quantum wells, semiconductors

KW - C: electron-electron interactions, optical properties

KW - E: luminescence

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DO - 10.1016/0038-1098(95)00758-X

M3 - Article

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SN - 0038-1098

VL - 97

SP - 741

EP - 745

JO - Solid State Communications

JF - Solid State Communications

IS - 9

ER -

Thermodynamics of free trions in mixed type GaAs/AlAs quantum wells

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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