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UFN, 2016, Volume 186, Number 10, Pages 1035–1057 (Mi ufn5653)  

This article is cited in 9 scientific papers (total in 9 papers)

100th ANNIVERSARY OF THE BIRTH OF V L GINZBURG. REVIEWS OF TOPICAL PROBLEMS

High-temperature superconductivity in FeSe monolayers

M. V. Sadovskiiab

a M.N. Mikheev Institute for Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg
b Institute of Electrophysics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg

Abstract: This paper reviews the basic experimental and theoretical aspects of high-temperature superconductivity in intercalated FeSe compounds and FeSe monolayer films on $SrTiO_3$ and similar substrates. The paper examines in detail the electronic structure of these systems, how it is calculated, and how the calculated results compare with ARPES experiments. It is emphasized that the reviewed systems have qualitatively different electronic spectra from the typical pattern of well-studied FeAs superconductors and explores the implications of these differences for a theoretical description of how these spectra form. Possible mechanisms of Cooper pairing in FeSe monolayers are discussed and the associated problems are examined. Because FeSe monolayer films on $SrTiO_3$ are typical Ginzburg ‘sandwiches’, the possibility of increasing their $T_c$ via ‘excitonic’ superconductivity mechanisms is considered. It is shown that, while the classical version of this mechanism (as proposed for such systems by Allender, Bray, and Bardeen) fails to explain the observed values of $T_c$, the situation changes when optical phonons in $SrTiO_3$ (with energy of about 100 meV) are considered to be ‘excitons’. Both the simplest possible model of $T_c$ enhancement due to interaction with such phonons and more complex ones with dominant ‘forward’ scattering that explain successfully the increase in $T_c$ compared to bulk FeSe and intercalated FeSe systems are verified. Problems related to the antiadiabatic nature of this superconductivity mechanism are also discussed.

Funding Agency Grant Number
Russian Science Foundation 14-12-00502
Russian Academy of Sciences - Federal Agency for Scientific Organizations 0389-2014-0001
Russian Foundation for Basic Research 14-02-00065
This research was supported by the Russian Science Foundation grant No. 14-12-00502 and also by FASO State contract No. 0389-2014-0001 with a partial support from RFBR grant No. 14-02-00065.


DOI: https://doi.org/10.3367/UFNr.2016.06.037825

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English version:
Physics–Uspekhi, 2016, 59:10, 947–967

Bibliographic databases:

PACS: 74.20.-z, 74.20.Fg, 74.20.Mn, 74.20.Rp, 74.25.Jb, 74.62.-c, 74.70.-b
Received: April 14, 2016
Revised: June 8, 2016
Accepted: June 9, 2016

Citation: M. V. Sadovskii, “High-temperature superconductivity in FeSe monolayers”, UFN, 186:10 (2016), 1035–1057; Phys. Usp., 59:10 (2016), 947–967

Citation in format AMSBIB
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\by M.~V.~Sadovskii
\paper High-temperature superconductivity in FeSe monolayers
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\yr 2016
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\issue 10
\pages 1035--1057
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\jour Phys. Usp.
\yr 2016
\vol 59
\issue 10
\pages 947--967
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    2. Bohmer A.E., Kreisel A., “Nematicity, Magnetism and Superconductivity in Fese”, J. Phys.-Condes. Matter, 30:2 (2018), 023001  crossref  isi
    3. Kim S.Y., Kim T.Yu., Sandilands L.J., Sinn S., Lee M.-Ch., Son J., Lee S., Choi K.-Y., Kim W., Park B.-G., Jeon C., Kim H.-D., Park Ch.-H., Park J.-G., Moon S.J., Noh T.W., “Charge-Spin Correlation in Van der Waals Antiferromagnet Nips3”, Phys. Rev. Lett., 120:13 (2018), 136402  crossref  isi
    4. Nekrasov I.A., Pavlov N.S., Sadovskii M.V., “Electronic Structure of Fese Monolayer Superconductors: Shallow Bands and Correlations”, J. Exp. Theor. Phys., 126:4 (2018), 485–496  crossref  mathscinet  isi
    5. Sakoda M., Iida K., Naito M., “Recent Progress in Thin-Film Growth of FE-Based Superconductors: Superior Superconductivity Achieved By Thin Films”, Supercond. Sci. Technol., 31:9 (2018), 093001  crossref  isi  scopus
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    7. Ojeda Collado H.P., Lorenzana J., Usaj G., Balseiro C.A., “Population Inversion and Dynamical Phase Transitions in a Driven Superconductor”, Phys. Rev. B, 98:21 (2018), 214519  crossref  isi  scopus
    8. Kreisel A., Andersen B.M., Hirschfeld P.J., “Itinerant Approach to Magnetic Neutron Scattering of Fese: Effect of Orbital Selectivity”, Phys. Rev. B, 98:21 (2018), 214518  crossref  isi  scopus
    9. Ya. V. Zhumagulov, V. A. Kashurnikov, A. V. Krasavin, A. E. Lukyanov, V. D. Neverov, “Phase diagram of the two-orbital model for iron-based HTSC: variational cluster approximation”, JETP Letters, 109:1 (2019), 45–50  mathnet  crossref  crossref  elib
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