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

被引：0

作者：

Yang, Zihao ^{[1
,2
]}

Liu, Ziyu ^{[3
]}

Liang, Jiehui ^{[1
,2
]}

Wang, Yifan ^{[1
,2
]}

Wurstbauer, Ursula ^{[4
]}

Dean, Cory R. ^{[3
]}

West, Ken W. ^{[5
]}

Pfeiffer, Loren N. ^{[5
]}

Du, Lingjie ^{[1
,2
,6
]}

机构：

[1] Nanjing Univ, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China

[3] Columbia Univ, Dept Phys, New York, NY 10027 USA

[4] Univ Munster, Inst Phys, Wilhelm Klemm Str 10, D-48149 Munster, Germany

[5] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[6] Nanjing Univ, Shishan Lab, Suzhou Campus, Suzhou 215000, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 2023年 / 371卷

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

GaAs quantum well; Photoluminescence fine structures; Charged exciton; Extreme quantum limit; NEGATIVELY CHARGED EXCITONS; PHOTOLUMINESCENCE;

D O I：

10.1016/j.ssc.2023.115249

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

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 similar to 50 mK. In the extreme quantum limit up to 7.0 T (corresponding to Landau level filling factor nu similar to 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 noninteracting band structures, indicating significant effects of many-body interactions.

引用

页数：5

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