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UFN, Forthcoming paper (Mi ufn6329)  

REVIEWS OF TOPICAL PROBLEMS

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

L. V. Kulik, A. V. Gorbunov, S. M. Dikman, V. B. Timofeev

Institute of Solid State Physics Russian Academy of Sciences, Chernogolovka, Moscow region

Abstract: 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 $\nu=1$) and spin-cyclotron excitons in quantum Hall isolator ($\nu=2$). 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 .

Funding Agency Grant Number
Russian Science Foundation 16-12-10075


DOI: https://doi.org/10.3367/UFNr.2018.10.038463


English version:
Physics–Uspekhi, 2019, 62

Document Type: Article
PACS: 71.35.Lk, 73.21.Fg, 78.67.De
MSC: 81V70;
Received: June 15, 2018
Revised: October 11, 2018
Accepted: October 31, 2018

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