Low Temperature Physics: 38, 1063 (2012); https://doi.org/10.1063/1.4766585 (4 pages)
Fizika Nizkikh Temperatur: Volume 38, Number 11 (November 2012), p. 1347-1351 ( to contents , go back )
A possibility of large superconducting gap in the presence of quantum fluctuations
Institute of Microelectronics Technology and High Purity Materials RAS, Chernogolovka, Moscow Region, 142432, Russia
Received June 14, 2012
According to the BCS model the probability of electron states filling vk2 as a function of kinetic energy is smeared. A modified mechanism of vk2 formation is proposed which takes the fluctuations near the quantum phase transition into account. The estimations of a superconducting gap in the presence of fluctuations for a material with HTS parameters give values comparable with those observed. The characteristic features of the proposed model resemble the properties of HTS.
PACS: 74.20.Fg BCS theory and its development;
Key words: high-temperature superconductivity, quantum fluctuations, BCS.