Publication: Multiband Superconductivity in High-Pressure Sulfur Hydrides
Дата
2023
Авторы
Ummarino, G. A.
Bianconi, A.
Journal Title
Journal ISSN
Volume Title
Издатель
Аннотация
The temperature dependence of the two superconducting gaps in pressurised H3S at 155 GPa with a critical temperature of 203 K has been determined using a data analysis of the experimental curve of the upper critical magnetic field as a function of temperature in the framework of the two-band s-wave Eliashberg theory. Two different phonon-mediated intra-band Cooper pairing channels in a regime of moderate strong couplings have the key role of the pair-exchange interaction between the two gaps, giving the two non-diagonal terms of the coupling tensor, which are missing in the single-band s-wave Eliashberg theory. The results provide a prediction of the different temperature dependence of the small and large gaps as a function of temperature, which provides evidence of multigap superconductivity in H3S.
Описание
Ключевые слова
Two-Band Superconductivity , Superconductivity , Critical field , Room-temperature superconductor
Цитирование
Ummarino, G. A. Multiband Superconductivity in High-Pressure Sulfur Hydrides / Ummarino, G. A., Bianconi, A. // Condensed Matter. - 2023. - 8. - № 3. - 10.3390/condmat8030069