Charged excitons in fractional quantum Hall regime

M. Byszewski, B. Chwalisz-Pietka, D. K. Maude, M. L. Sadowski, M. Potemski, T. Saku, Y. Hirayama, S. Studenikin, G. Austing, A. S. Sachrajda, P. Hawrylak

研究成果: Conference contribution

抄録

We report on photoluminescence experiments carried out at very low temperatures and with magnetic fields up to 28T. performed on a high mobility two-dimensional electron gas GaAs/AlGaAs quantum well. Our experiments show that clear signatures of the v =1/3, 2/5, 3/7, 3/5, 2/3, 1 sequence of the FQHE states can also be easily visible even in raw magneto-photoluminescence spectra. Theoretical calculations of excitonic transitions suggest that an explanation of the red shift of emission energy at the Hall plateau boundary may be due to the appearance of additional free charged quasi-particles that bind to an exciton, forming a fractionally charged exciton whose emission energy is expected to be lower, in analogy to well known charged excitons in n-type semiconductors. The magnitude of the shift is a measure of the fractionally charged exciton binding energy. Emission in the insulating state of 2DEG at v = 1/3 is attributed to a neutral quasi-exciton whose complicated energy dispersion results in an emission doublet with its low energy line due to the recombination from excited excitonic states.

本文言語English
ホスト出版物のタイトルPhysics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B
ページ655-656
ページ数2
DOI
出版ステータスPublished - 2007
イベント28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria
継続期間: 2006 7月 242006 7月 28

出版物シリーズ

名前AIP Conference Proceedings
893
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

Other28th International Conference on the Physics of Semiconductors, ICPS 2006
国/地域Austria
CityVienna
Period06/7/2406/7/28

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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