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

I.N. Zhilyaev

Institute of Microelectronics Technology and High Purity Materials RAS, Chernogolovka, Moscow Region, 142432, Russia
E-mail: zhilyaev@ipmt-hpm.ac.ru
pos Анотація:

Received June 14, 2012

Abstract

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;
PACS: 74.40.Kb Quantum critical phenomena;
PACS: 74.72.–h Cuprate superconductors.

Key words: high-temperature superconductivity, quantum fluctuations, BCS.

Download 287240 byte View Contents