What can we learn from comparison between cuprates and He films ? : phase separation and fluctuating superfluidity
Abstract
In the underdoped, overdoped, Zn-doped or stripe-forming regions of high- cuprate superconductors (HTSC), the superfluid density at shows universal correlations with . Similar strong correlations exist between 2-dimensional superfluid density and superfluid transition temperature in thin films of He in non-porous or porous media, and He/He film adsorbed on porous media. Based on analogy between HTSC and He film systems, we propose a model for cuprates where: (1) the overdoped region is characterized by a phase separation similar to He/He; and (2) pair (boson) formation and fluctuating superconductivity occur at separate temperatures above in the underdoped region.
Keywords
Cite
@article{arxiv.cond-mat/0012016,
title = {What can we learn from comparison between cuprates and He films ? : phase separation and fluctuating superfluidity},
author = {Y. J. Uemura},
journal= {arXiv preprint arXiv:cond-mat/0012016},
year = {2009}
}
Comments
8 pages, 5 figures. Invited paper presented at the third international conference on stripes and high-Tc superconductivity (STRIPE-2000), Sept. 25-30th, 2000, Rome, Italy. To be published in the International Journal of Modern Physics B