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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2016, Volume 103, Issue 11, Pages 795–800
DOI: https://doi.org/10.7868/S0370274X16110084 (Mi jetpl4956) 		 
This article is cited in 2 scientific papers (total in 2 papers)

CONDENSED MATTER

The occurrence of a Mott-like gap in single-particle spectra of electron systems possessing flat bands

V. A. Khodelabc

a National Research Centre Kurchatov Institute, 123182 Moscow, Russia
b McDonnell Center for the Space Sciences, Washington University, St. Louis, MO 63130, USA
c Department of Physics, Washington University, St. Louis, MO 63130, USA
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DOI: https://doi.org/10.7868/S0370274X16110084
Abstract: An unconventional type of the Mott's insulators where the gap in the spectrum of single-particle excitations is associated with repulsive effective interactions between quasiparticles is shown to exist in strongly correlated electron systems of solids that possess flat bands. The occurrence of this gap is demonstrated to be the consequence of violation of particle-hole symmetry, inherent in such systems. The results obtained are applied to elucidate the Fermi arc structure observed at temperatures up to 100 K in angle-resolved photoemission spectra of the compound Sr$_2$IrO$_4$, not showing superconductivity down to low $T$.
Funding agency Grant number
Russian Foundation for Basic Research 14-02-00107_a
15-02-06261_а
Ministry of Education and Science of the Russian Federation NMSh-932-2014.2
This work was partially supported by the Russian Foundation for Basic Researches, (project # 14-02-00107-a and 15-02-06261) and by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools, (project # NMSh-932-2014.2). I also thank the McDonnel Center for the Space Sciences for support.
Received: 18.04.2016
English version:
Journal of Experimental and Theoretical Physics Letters, 2016, Volume 103, Issue 11, Pages 702–707
DOI: https://doi.org/10.1134/S0021364016110060
Bibliographic databases:
Document Type: Article
Language: English
Citation: V. A. Khodel, “The occurrence of a Mott-like gap in single-particle spectra of electron systems possessing flat bands”, Pis'ma v Zh. Èksper. Teoret. Fiz., 103:11 (2016), 795–800; JETP Letters, 103:11 (2016), 702–707
Citation in format AMSBIB
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