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/ 000504893200002 2-s2.0-85080883626 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) BibTexBibNote ® (generic) BibNote ® (RIS)MedlineRefWorks TY JOUR TI Spin excitations in two-dimensional electron gas, their relaxation, photoexcitation and detection methods, and the role of Coulomb correlations AU Kulik, L. V. AU Gorbunov, A. V. AU Dickmann, S. M. AU Timofeev, V. B. PB Physics-Uspekhi PY 2019 JO Physics-Uspekhi JF Physics-Uspekhi JA Phys. Usp. VL 62 IS 9 SP 865-891 UR https://ufn.ru/en/articles/2019/9/b/ ER https://doi.org/10.3367/UFNe.2018.10.038463 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