Magneto-photoluminescence fine structures of a two-dimensional electron gas in the extreme quantum limit

Zihao Yang; Ziyu Liu; Jiehui Liang; Yifan Wang; Ursula Wurstbauer; Cory R. Dean; Ken W. West; Loren N. Pfeiffer; Lingjie Du

doi:10.1016/j.ssc.2023.115249

Magneto-photoluminescence fine structures of a two-dimensional electron gas in the extreme quantum limit

Zihao Yang, Ziyu Liu, Jiehui Liang, Yifan Wang, Ursula Wurstbauer, Cory R. Dean, Ken W. West, Loren N. Pfeiffer, Lingjie Du

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

Abstract

We study magneto-photoluminescence (PL) spectra of a two-dimensional electron system in an ultrahigh-mobility GaAs/AlGaAs single quantum well at a very low temperature ∼ 50 mK. In the extreme quantum limit up to 7.0 T (corresponding to Landau level filling factor ν∼0.29), we observe an unexpectedly large number of sharp PL peaks. These fine structures are split from fundamental optical transitions assigned to negatively charged excitons (trions) and neutral excitons. They are found to exhibit unconventional circular polarization characteristics. The emergence of circularly polarized PL fine structures cannot be described by non-interacting band structures, indicating significant effects of many-body interactions.

Original language	English (US)
Article number	115249
Journal	Solid State Communications
Volume	371
DOIs	https://doi.org/10.1016/j.ssc.2023.115249
State	Published - Oct 1 2023

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

Keywords

Charged exciton
Extreme quantum limit
GaAs quantum well
Photoluminescence fine structures

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10.1016/j.ssc.2023.115249

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title = "Magneto-photoluminescence fine structures of a two-dimensional electron gas in the extreme quantum limit",

abstract = "We study magneto-photoluminescence (PL) spectra of a two-dimensional electron system in an ultrahigh-mobility GaAs/AlGaAs single quantum well at a very low temperature ∼ 50 mK. In the extreme quantum limit up to 7.0 T (corresponding to Landau level filling factor ν∼0.29), we observe an unexpectedly large number of sharp PL peaks. These fine structures are split from fundamental optical transitions assigned to negatively charged excitons (trions) and neutral excitons. They are found to exhibit unconventional circular polarization characteristics. The emergence of circularly polarized PL fine structures cannot be described by non-interacting band structures, indicating significant effects of many-body interactions.",

keywords = "Charged exciton, Extreme quantum limit, GaAs quantum well, Photoluminescence fine structures",

author = "Zihao Yang and Ziyu Liu and Jiehui Liang and Yifan Wang and Ursula Wurstbauer and Dean, {Cory R.} and West, {Ken W.} and Pfeiffer, {Loren N.} and Lingjie Du",

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year = "2023",

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doi = "10.1016/j.ssc.2023.115249",

language = "English (US)",

volume = "371",

journal = "Solid State Communications",

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TY - JOUR

T1 - Magneto-photoluminescence fine structures of a two-dimensional electron gas in the extreme quantum limit

AU - Yang, Zihao

AU - Liu, Ziyu

AU - Liang, Jiehui

AU - Wang, Yifan

AU - Wurstbauer, Ursula

AU - Dean, Cory R.

AU - West, Ken W.

AU - Pfeiffer, Loren N.

AU - Du, Lingjie

PY - 2023/10/1

Y1 - 2023/10/1

N2 - We study magneto-photoluminescence (PL) spectra of a two-dimensional electron system in an ultrahigh-mobility GaAs/AlGaAs single quantum well at a very low temperature ∼ 50 mK. In the extreme quantum limit up to 7.0 T (corresponding to Landau level filling factor ν∼0.29), we observe an unexpectedly large number of sharp PL peaks. These fine structures are split from fundamental optical transitions assigned to negatively charged excitons (trions) and neutral excitons. They are found to exhibit unconventional circular polarization characteristics. The emergence of circularly polarized PL fine structures cannot be described by non-interacting band structures, indicating significant effects of many-body interactions.

AB - We study magneto-photoluminescence (PL) spectra of a two-dimensional electron system in an ultrahigh-mobility GaAs/AlGaAs single quantum well at a very low temperature ∼ 50 mK. In the extreme quantum limit up to 7.0 T (corresponding to Landau level filling factor ν∼0.29), we observe an unexpectedly large number of sharp PL peaks. These fine structures are split from fundamental optical transitions assigned to negatively charged excitons (trions) and neutral excitons. They are found to exhibit unconventional circular polarization characteristics. The emergence of circularly polarized PL fine structures cannot be described by non-interacting band structures, indicating significant effects of many-body interactions.

KW - Charged exciton

KW - Extreme quantum limit

KW - GaAs quantum well

KW - Photoluminescence fine structures

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U2 - 10.1016/j.ssc.2023.115249

DO - 10.1016/j.ssc.2023.115249

M3 - Article

AN - SCOPUS:85163718745

SN - 0038-1098

VL - 371

JO - Solid State Communications

JF - Solid State Communications

M1 - 115249

ER -

Magneto-photoluminescence fine structures of a two-dimensional electron gas in the extreme quantum limit

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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