2008/09/24 by Wonkee Kim, Yan Chen, Kim, Wonkee +3
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Theoretical and Computational Physics #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.0809.4273
3 figures
arxiv created 2008/09/24 · arxiv updated 2009/12/01
Within the phase fluctuation picture for the pseudogap state of a high-Tc superconductor, we incorporate the phase fluctuations generated by the classical XY model with the Bogoliubov-de Gennes formalism utilizing a field-theoretical method. This picture delineates the inhomogeneous characteristics of local order parameters observed in high-Tc superconductors above Tc. We also compute the local density of states near a non-magnetic impurity with a strong scattering potential. The resonance peak smoothly evolves as temperature increases through Tc without showing any sudden broadening, which is consistent with recent experimental findings.