Abstract
The experimental discovery of the highest, up to 0 degree Celsius, superconducting transition temperatures T\(_c\) in the class of so-called hydrides under high pressure is undoubtedly the striking event in modern physics. In this paper, we give a short overview of the some history of the room-temperature conventional superconductivity. A theoretical description of such high T\(_c\), as was shown and even predicted in a number of ab initio works, can be unambiguously given in the framework of the electron–phonon mechanism of Cooper pairing. Thus, the basic equation to calculate T\(_c\) will be the one proposed in 1957 by Bardeen, Cooper, and Schriefer. It is known that in this case the value of T\(_c\) is directly determined by a number of effective parameters: the Debye frequency, the density of electronic states at the Fermi level, and the electron–phonon interaction constant. Within the framework of the modern development of the density functional theory, all these quantities can be obtained using standard packages for band structure calculations.
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This work was partially supported by RFBR grant No. 20-02-00011.
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Nekrasov, I., Ovchinnikov, S. Hydrides under High Pressure. J Supercond Nov Magn 35, 959–963 (2022). https://doi.org/10.1007/s10948-021-06087-3
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DOI: https://doi.org/10.1007/s10948-021-06087-3