Dimensionality-induced BCS-BEC crossover in layered superconductors
Superconductivity
2018-11-20 v2
Abstract
Based on a simple model of a layered superconductor with strong attractive interaction, we find that the separation of the pair-condensation temperature from the pair-formation temperature becomes more remarkable as the interlayer hopping gets smaller. We propose from this result the BCS-BEC crossover induced by the change in dimensionality, for instance, due to insertion of additional insulating layers or application of uniaxial pressure. The emergence of a pseudogap in the electronic density of states, which supports the idea of the dimensionality-induced BCS-BEC crossover, is also verified.
Cite
@article{arxiv.1809.01837,
title = {Dimensionality-induced BCS-BEC crossover in layered superconductors},
author = {Kyosuke Adachi and Ryusuke Ikeda},
journal= {arXiv preprint arXiv:1809.01837},
year = {2018}
}
Comments
5 pages, 4 figures (main text); 3 pages, 1 figure (Supplemental Material)