A.V. Larionov^†, A.V. Gorbunov^‡, L.V. Kulik^§
Osipyan Institute of Solid State Physics, Russian Academy of Sciences, Akademika Osip'yana str. 2, Chernogolovka, Moscow Region, 142432, Russian Federation

A review of experimental studies of the properties of a recently discovered new coherent collective state, a magnetoexciton condensate, is presented. Condensation occurs at temperatures below 1 K in a Fermi system, an integer quantum Hall dielectric (filling factor ν =2), as a result of the formation of a dense ensemble of long-lived triplet spin cyclotron magnetoexcitons, composite bosons. Using a high-aperture, high-resolution optical system, the formation and spreading of dense photoexcitation ensembles in real space in integer and fractional quantum Hall dielectrics with filling factors ν =2 and ν =1/3 is visualized. The correlation between the transport and coherence properties of these ensembles is analyzed.

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Keywords: magnetoexcitons, quantum Hall insulator, collective excitations, magnetoexciton condensate
PACS: 71.35.Ji, 71.35.Lk, 73.21.Fg, 73.43.Lp (all)
DOI: 10.3367/UFNe.2025.04.040008
URL: https://ufn.ru/en/articles/2026/5/d/
Citation: Larionov A V, Gorbunov A V, Kulik L V "Exciton condensates in integer and fractional quantum Hall dielectrics" Phys. Usp. 69 (5) (2026)

Received: 11th, July 2025, accepted: 23rd, April 2025

Оригинал: Ларионов А В, Горбунов А В, Кулик Л В «Экситонные конденсаты в целочисленных и дробных квантово-холловских диэлектриках» УФН 196 490–505 (2026); DOI: 10.3367/UFNr.2025.04.040008