Electronic structure of FeSe monolayer superconductors
We review a variety of theoretical and experimental results concerning electronic band structure of superconducting materials based on FeSe monolayers. Three type of systems are analyzed: intercalated FeSe systems AxFe₂Se₂–xSx and [Li₁–xFexOH]FeSe as well as the single FeSe layer films on SrTiO₃ sub...
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| Published in: | Физика низких температур |
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| Date: | 2016 |
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| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2016
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/129310 |
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| Cite this: | Electronic structure of FeSe monolayer superconductors / I.A. Nekrasov, N.S. Pavlov, M.V. Sadovskii, A.A. Slobodchikov // Физика низких температур. — 2016. — Т. 42, № 10. — С. 1137-1147. — Бібліогр.: 53 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862533382816137216 |
|---|---|
| author | Nekrasov, I.A. Pavlov, N.S. Sadovskii, M.V. Slobodchikov, A.A. |
| author_facet | Nekrasov, I.A. Pavlov, N.S. Sadovskii, M.V. Slobodchikov, A.A. |
| citation_txt | Electronic structure of FeSe monolayer superconductors / I.A. Nekrasov, N.S. Pavlov, M.V. Sadovskii, A.A. Slobodchikov // Физика низких температур. — 2016. — Т. 42, № 10. — С. 1137-1147. — Бібліогр.: 53 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | We review a variety of theoretical and experimental results concerning electronic band structure of superconducting materials based on FeSe monolayers. Three type of systems are analyzed: intercalated FeSe systems AxFe₂Se₂–xSx and [Li₁–xFexOH]FeSe as well as the single FeSe layer films on SrTiO₃ substrate. We present the results of detailed first principle electronic band structure calculations for these systems together with comparison with some experimental ARPES data. The electronic structure of these systems is rather different from that of typical FeAs superconductors, which is quite significant for possible microscopic mechanism of superconductivity. This is reflected in the absence of hole pockets of the Fermi surface at T-point in Brillouin zone, so that there are no “nesting” properties of different Fermi surface pockets. LDA + DMFT calculations show that correlation effects on Fe-3d states in the single FeSe layer are not that strong as in most of FeAs systems. As a result, at present there is no theoretical understanding of the formation of rather “shallow” electronic bands at M-points. LDA calculations show that the main difference in electronic structure of FeSe monolayer on SrTiO ₃ substrate from isolated FeSe layer is the presence of the band of O-2p surface states of TiO₂ layer on the Fermi level together with Fe-3d states, which may be important for understanding the enhanced Tc values in this system. We briefly discuss the implications of our results for microscopic models of superconductivity.
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| first_indexed | 2025-11-24T06:21:06Z |
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| id | nasplib_isofts_kiev_ua-123456789-129310 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-11-24T06:21:06Z |
| publishDate | 2016 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
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| spelling | Nekrasov, I.A. Pavlov, N.S. Sadovskii, M.V. Slobodchikov, A.A. 2018-01-18T18:01:16Z 2018-01-18T18:01:16Z 2016 Electronic structure of FeSe monolayer superconductors / I.A. Nekrasov, N.S. Pavlov, M.V. Sadovskii, A.A. Slobodchikov // Физика низких температур. — 2016. — Т. 42, № 10. — С. 1137-1147. — Бібліогр.: 53 назв. — англ. 0132-6414 PACS: 74.20.–z, 74.20.Rp, 74.25.Jb, 74.70.–b https://nasplib.isofts.kiev.ua/handle/123456789/129310 We review a variety of theoretical and experimental results concerning electronic band structure of superconducting materials based on FeSe monolayers. Three type of systems are analyzed: intercalated FeSe systems AxFe₂Se₂–xSx and [Li₁–xFexOH]FeSe as well as the single FeSe layer films on SrTiO₃ substrate. We present the results of detailed first principle electronic band structure calculations for these systems together with comparison with some experimental ARPES data. The electronic structure of these systems is rather different from that of typical FeAs superconductors, which is quite significant for possible microscopic mechanism of superconductivity. This is reflected in the absence of hole pockets of the Fermi surface at T-point in Brillouin zone, so that there are no “nesting” properties of different Fermi surface pockets. LDA + DMFT calculations show that correlation effects on Fe-3d states in the single FeSe layer are not that strong as in most of FeAs systems. As a result, at present there is no theoretical understanding of the formation of rather “shallow” electronic bands at M-points. LDA calculations show that the main difference in electronic structure of FeSe monolayer on SrTiO ₃ substrate from isolated FeSe layer is the presence of the band of O-2p surface states of TiO₂ layer on the Fermi level together with Fe-3d states, which may be important for understanding the enhanced Tc values in this system. We briefly discuss the implications of our results for microscopic models of superconductivity. Calculations of electronic structure of FeSe systems
 were performed under the FASO state contract
 No. 0389-2014-0001 and partially supported by RFBR
 grant 14-02-00065. NSP and AAS work was also supported
 by the President of Russia grant for young scientists
 No. Mk-5957.2016.2. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур К 30-летию открытия высокотемпературной сверхпроводимости Electronic structure of FeSe monolayer superconductors Article published earlier |
| spellingShingle | Electronic structure of FeSe monolayer superconductors Nekrasov, I.A. Pavlov, N.S. Sadovskii, M.V. Slobodchikov, A.A. К 30-летию открытия высокотемпературной сверхпроводимости |
| title | Electronic structure of FeSe monolayer superconductors |
| title_full | Electronic structure of FeSe monolayer superconductors |
| title_fullStr | Electronic structure of FeSe monolayer superconductors |
| title_full_unstemmed | Electronic structure of FeSe monolayer superconductors |
| title_short | Electronic structure of FeSe monolayer superconductors |
| title_sort | electronic structure of fese monolayer superconductors |
| topic | К 30-летию открытия высокотемпературной сверхпроводимости |
| topic_facet | К 30-летию открытия высокотемпературной сверхпроводимости |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/129310 |
| work_keys_str_mv | AT nekrasovia electronicstructureoffesemonolayersuperconductors AT pavlovns electronicstructureoffesemonolayersuperconductors AT sadovskiimv electronicstructureoffesemonolayersuperconductors AT slobodchikovaa electronicstructureoffesemonolayersuperconductors |