Impurity Effects on the Flux Phase Quantum Critical Point Scenario
Superconductivity
2016-08-31 v1 Strongly Correlated Electrons
Abstract
Impurity substitution of Zn in La-214 and (Y,Ca)-123 high-T_c superconductors suppresses T_c but does not affect appreciably the onset of the pseudogap phase in the underdoped region nor optimal doping or the position of the inferred quantum critical point. Based on a 1/N expansion of the t-J model we explain these findings as well as the similar dependence on a magnetic field in terms of a quantum critical point scenario where a flux phase causes the pseudogap.
Cite
@article{arxiv.cond-mat/9912133,
title = {Impurity Effects on the Flux Phase Quantum Critical Point Scenario},
author = {E. Cappelluti and R. Zeyher},
journal= {arXiv preprint arXiv:cond-mat/9912133},
year = {2016}
}
Comments
europhys.sty, 3 eps figures included, to appear on Europhysics Letters