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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| Опубліковано в: : | Физика низких температур |
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| Дата: | 2016 |
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| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2016
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | 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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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 |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Electronic structure of FeSe monolayer superconductors |
| 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_short |
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_sort |
electronic structure of fese monolayer superconductors |
| 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. |
| topic |
К 30-летию открытия высокотемпературной сверхпроводимости |
| topic_facet |
К 30-летию открытия высокотемпературной сверхпроводимости |
| publishDate |
2016 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| 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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| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/129310 |
| fulltext |
|
| 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. |
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2025-11-24T06:21:06Z |
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2025-11-24T06:21:06Z |
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