Local transformation of the electronic structure and generation of free carriers in cuprates and ferropnictides under heterovalent and isovalent doping
We have previously shown that most of the anomalies in the superconducting characteristics of cuprates and ferropnictides observed at dopant concentrations within the superconducting dome, as well as the position of the domes in the phase diagrams, do not require knowledge of the details of their el...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221137972200300X |
| _version_ | 1818204116335198208 |
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| author | Kirill Mitsen Olga Ivanenko |
| author_facet | Kirill Mitsen Olga Ivanenko |
| author_sort | Kirill Mitsen |
| collection | DOAJ |
| description | We have previously shown that most of the anomalies in the superconducting characteristics of cuprates and ferropnictides observed at dopant concentrations within the superconducting dome, as well as the position of the domes in the phase diagrams, do not require knowledge of the details of their electronic structure for explanation, but can be understood and calculated with high accuracy within the framework of a simple model describing the cluster structure of the superconducting phase. This fact suggests a change in the paradigm that forms our understanding of HTSC. In this paper, we propose a unified view on the transformation of the electronic structure of cuprates and ferropnictides upon heterovalent and isovalent doping, based on the assumption of self-localization of doped carriers. In this representation, in undoped cuprates and ferropnictides, which initially have different electronic structures (Mott insulator and semimetal), local doping forms percolation clusters with the same electronic structure of a self-doped excitonic insulator where a specific mechanism of superconducting pairing is implemented, which is genetically inherent in such a system. The proposed model includes a mechanism for generating additional free carriers under heterovalent and isovalent doping and makes it possible to predict their sign, which, in the general case, does not coincide with the sign of doped carriers. |
| first_indexed | 2024-12-12T03:36:07Z |
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| id | doaj.art-c1dcaeba8a0c47cfb5e60783ade86036 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-12T03:36:07Z |
| publishDate | 2022-07-01 |
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| spelling | doaj.art-c1dcaeba8a0c47cfb5e60783ade860362022-12-22T00:39:48ZengElsevierResults in Physics2211-37972022-07-0138105577Local transformation of the electronic structure and generation of free carriers in cuprates and ferropnictides under heterovalent and isovalent dopingKirill Mitsen0Olga Ivanenko1Corresponding author.; Lebedev Physical Institute, Leninsky pr., 53, Moscow 119991, RussiaLebedev Physical Institute, Leninsky pr., 53, Moscow 119991, RussiaWe have previously shown that most of the anomalies in the superconducting characteristics of cuprates and ferropnictides observed at dopant concentrations within the superconducting dome, as well as the position of the domes in the phase diagrams, do not require knowledge of the details of their electronic structure for explanation, but can be understood and calculated with high accuracy within the framework of a simple model describing the cluster structure of the superconducting phase. This fact suggests a change in the paradigm that forms our understanding of HTSC. In this paper, we propose a unified view on the transformation of the electronic structure of cuprates and ferropnictides upon heterovalent and isovalent doping, based on the assumption of self-localization of doped carriers. In this representation, in undoped cuprates and ferropnictides, which initially have different electronic structures (Mott insulator and semimetal), local doping forms percolation clusters with the same electronic structure of a self-doped excitonic insulator where a specific mechanism of superconducting pairing is implemented, which is genetically inherent in such a system. The proposed model includes a mechanism for generating additional free carriers under heterovalent and isovalent doping and makes it possible to predict their sign, which, in the general case, does not coincide with the sign of doped carriers.http://www.sciencedirect.com/science/article/pii/S221137972200300XHigh temperature superconductorsCupratesFerropnictidesExcitonic insulatorIsovalent dopingHeterovalent doping |
| spellingShingle | Kirill Mitsen Olga Ivanenko Local transformation of the electronic structure and generation of free carriers in cuprates and ferropnictides under heterovalent and isovalent doping Results in Physics High temperature superconductors Cuprates Ferropnictides Excitonic insulator Isovalent doping Heterovalent doping |
| title | Local transformation of the electronic structure and generation of free carriers in cuprates and ferropnictides under heterovalent and isovalent doping |
| title_full | Local transformation of the electronic structure and generation of free carriers in cuprates and ferropnictides under heterovalent and isovalent doping |
| title_fullStr | Local transformation of the electronic structure and generation of free carriers in cuprates and ferropnictides under heterovalent and isovalent doping |
| title_full_unstemmed | Local transformation of the electronic structure and generation of free carriers in cuprates and ferropnictides under heterovalent and isovalent doping |
| title_short | Local transformation of the electronic structure and generation of free carriers in cuprates and ferropnictides under heterovalent and isovalent doping |
| title_sort | local transformation of the electronic structure and generation of free carriers in cuprates and ferropnictides under heterovalent and isovalent doping |
| topic | High temperature superconductors Cuprates Ferropnictides Excitonic insulator Isovalent doping Heterovalent doping |
| url | http://www.sciencedirect.com/science/article/pii/S221137972200300X |
| work_keys_str_mv | AT kirillmitsen localtransformationoftheelectronicstructureandgenerationoffreecarriersincupratesandferropnictidesunderheterovalentandisovalentdoping AT olgaivanenko localtransformationoftheelectronicstructureandgenerationoffreecarriersincupratesandferropnictidesunderheterovalentandisovalentdoping |