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

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Institute of Solid-State Physics, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russian Federation

Spin excitations in a degenerate two-dimensional electron gas in a perpendicular quantizing magnetic field are discussed, namely, purely electronic spin magnetoexcitons. These are spin-wave- and 'Goldstone' excitons in quantum Hall ferromagnetic (filling factor ν=1) — and spin-cyclotron excitons in quantum Hall isolator (ν=2). The latter ones are distinguished by record-breaking long lifetimes, up to 1 ms, which allows to observe the transition to a fundamentally new collective state — magnetofermionic condensate at temperatures T .

Text is available here.

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
Citation: Kulik L V, Gorbunov A V, Dickmann S M, Timofeev V B "Spin excitations in two-dimensional electron gas, their relaxation, methods of photoexcitation and detection, role of Coulomb correlations" Phys. Usp., accepted

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, принята к публикации; DOI: 10.3367/UFNr.2018.10.038463

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