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

H. W. Yoon; A. Ron; M. D. Sturge; L. N. Pfeiffer

doi:10.1016/S0038-1098(96)00527-3

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

H. W. Yoon, A. Ron, M. D. Sturge, L. N. Pfeiffer

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20 Scopus citations

Abstract

We have measured the radiative lifetime and diffusivity of excitons and trions as a function of temperature and electron density. The radiative decay times increase linearly with temperature, as expected for free particles. From time- and spatially-resolved measurements of diffusion, we find that while trions and excitons are localized at 5 K, as the temperature is raised both become mobile. The diffusivities then increase linearly with bath temperature as expected for a classical gas with a temperature independent mobility, the trion mobility being about one half the exciton mobility. Our results are the first direct experimental evidence for free trions.

Original language	English (US)
Pages (from-to)	743-747
Number of pages	5
Journal	Solid State Communications
Volume	100
Issue number	11
DOIs	https://doi.org/10.1016/S0038-1098(96)00527-3
State	Published - Dec 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

Keywords

A. quantum wells
A. semiconductors
D. electron-electron interactions
D. optical properties
E. luminescence

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10.1016/S0038-1098(96)00527-3

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

abstract = "We have measured the radiative lifetime and diffusivity of excitons and trions as a function of temperature and electron density. The radiative decay times increase linearly with temperature, as expected for free particles. From time- and spatially-resolved measurements of diffusion, we find that while trions and excitons are localized at 5 K, as the temperature is raised both become mobile. The diffusivities then increase linearly with bath temperature as expected for a classical gas with a temperature independent mobility, the trion mobility being about one half the exciton mobility. Our results are the first direct experimental evidence for free trions.",

keywords = "A. quantum wells, A. semiconductors, D. electron-electron interactions, D. optical properties, E. luminescence",

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

year = "1996",

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doi = "10.1016/S0038-1098(96)00527-3",

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

AU - Yoon, H. W.

AU - Ron, A.

AU - Sturge, M. D.

AU - Pfeiffer, L. N.

PY - 1996/12

Y1 - 1996/12

N2 - We have measured the radiative lifetime and diffusivity of excitons and trions as a function of temperature and electron density. The radiative decay times increase linearly with temperature, as expected for free particles. From time- and spatially-resolved measurements of diffusion, we find that while trions and excitons are localized at 5 K, as the temperature is raised both become mobile. The diffusivities then increase linearly with bath temperature as expected for a classical gas with a temperature independent mobility, the trion mobility being about one half the exciton mobility. Our results are the first direct experimental evidence for free trions.

AB - We have measured the radiative lifetime and diffusivity of excitons and trions as a function of temperature and electron density. The radiative decay times increase linearly with temperature, as expected for free particles. From time- and spatially-resolved measurements of diffusion, we find that while trions and excitons are localized at 5 K, as the temperature is raised both become mobile. The diffusivities then increase linearly with bath temperature as expected for a classical gas with a temperature independent mobility, the trion mobility being about one half the exciton mobility. Our results are the first direct experimental evidence for free trions.

KW - A. quantum wells

KW - A. semiconductors

KW - D. electron-electron interactions

KW - D. optical properties

KW - E. luminescence

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DO - 10.1016/S0038-1098(96)00527-3

M3 - Article

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SN - 0038-1098

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SP - 743

EP - 747

JO - Solid State Communications

JF - Solid State Communications

IS - 11

ER -

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

Abstract

All Science Journal Classification (ASJC) codes

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