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

, , ,
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

Now text is available in Russian only.
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/
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 (9) (2019)

Received: 15th, June 2018, revised: 11th, October 2018, 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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