Theory of high-temperature superconductivity in a two-layer system: FeSe/SrTiO3
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PALISTRANT, Maria; DIGOR, Dumitru; PALISTRANT, Serghei. Theory of high-temperature superconductivity in a two-layer system: FeSe/SrTiO3. In: Moldavian Journal of the Physical Sciences. 2018, nr. 1-2(17), pp. 88-94. ISSN 1810-648X.
10.5281/zenodo.4019161
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Moldavian Journal of the Physical Sciences
Numărul 1-2(17) / 2018 / ISSN 1810-648X /ISSNe 2537-6365

Theory of high-temperature superconductivity in a two-layer system: FeSe/SrTiO3


DOI: 10.5281/zenodo.4019161
CZU: 537.533.35
Pag. 88-94

Palistrant Maria, Digor Dumitru, Palistrant Serghei
 
Institute of Applied Physics
 
Disponibil în IBN: 31 ianuarie 2019


Rezumat

The proposed model can qualitatively describe the occurrence of high-temperature superconductivity in FeSe/SrTiO3. The Hamiltonian of a two-layer system is reduced to a twoband Hamiltonian, taking into account all possible pairing of electrons inside one energy band and electrons in the different energy bands. The superconductivity mechanism can be both phononic and electronic. The main factor is the presence of a large number of constants of the electron–electron interactions that contribute to the formation of Cooper pairs and also the possibility of increasing the ratio of densities of electronic energy bands N2/N1 by doping the systems or in some other way. A method for experimental verification of the dominance of interband interactions over intraband interactions is proposed.