Pseudogap Induced by Superconducting Fluctuation in the d-p Model
Abstract
Using the d-p model, we demonstrate that the pseudogap, which is induced by the superconducting fluctuation, plays key roles in the determination of the phase diagram observed in high-Tc superconducting materials. We take the pairing interaction mediated by the spin fluctuation and calculate the superconducting transition temperature Tc, the NMR relaxation rate 1/T1 and the single-particle spectrum by treating both the superconducting fluctuation and spin fluctuation in a consistent fashion. As temperature decreases, 1/T1T increases at high temperatures, and it reaches a maximum followed by a sharp drop in the underdoped region, due to the evolution of the pseudogap in the single-particle spectrum. The evolution is also consistent with those of ARPES experiments.
Cite
@article{arxiv.cond-mat/9907006,
title = {Pseudogap Induced by Superconducting Fluctuation in the d-p Model},
author = {Akito Kobayashi and Atsushi Tsuruta and Tamifusa Matsuura and Yoshihiro Kuroda},
journal= {arXiv preprint arXiv:cond-mat/9907006},
year = {2009}
}
Comments
4 pages, 4 figures, to appear in J. Phys. Soc. Jpn. Vol. 68 No. 8