Spin excitations in two-dimensional electron gas, their relaxation, photoexcitation and detection methods, and the role of Coulomb correlations

L.V. Kulik, A.V. Gorbunov, S.M. Dickmann, V.B. Timofeev
Osipyan Institute of Solid State Physics, Russian Academy of Sciences, Akademika Osip'yana str. 2, Chernogolovka, Moscow Region, 142432, Russian Federation

We discuss spin excitations in a degenerate 2D electron gas in a perpendicular quantizing magnetic field: spin-wave and 'Goldstone' excitons in quantum Hall ferromagnetic (filling factor ν =1) and spin-cyclotron excitons in quantum Hall insulator (ν =2). The latter excited states exhibit record-setting long lifetimes, up to 1 ms, owing to which a transition to a basically new collective state, magnetofermionic condensate, is observable at temperatures T

Keywords: magnetoexcitons, quantum Hall isolator, quantum Hall ferromagnetic, collective excitations, magnetofermionic condensate
PACS: 71.35.Lk, 73.21.Fg, 78.67.De (all)
DOI: 10.3367/UFNe.2018.10.038463
URL: https://ufn.ru/en/articles/2019/9/b/
Web of Science

000504893200002
Scopus

2-s2.0-85080883626
ADS NASA

2019PhyU...62..865K
Citation: Kulik L V, Gorbunov A V, Dickmann S M, Timofeev V B "Spin excitations in two-dimensional electron gas, their relaxation, photoexcitation and detection methods, and the role of Coulomb correlations" Phys. Usp. 62 865–891 (2019)

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Received: 15th, June 2018, revised: 11th, October 2018, accepted: 31st, October 2018

Оригинал: Кулик Л В, Горбунов А В, Дикман С М, Тимофеев В Б «Спиновые возбуждения в двумерном электронном газе, их релаксация, методы фотовозбуждения и детектирования, роль кулоновских корреляций» УФН 189 925–954 (2019); DOI: 10.3367/UFNr.2018.10.038463

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