1999/07/22 by F. Schaefer, Schaefer, F., Carsten Timm +7
Engineering · Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/9907345
(5 pages, 3 figures included, minor changes, to appear in JLTP proceedings MOS99)
arxiv created 1999/08/06 · arxiv updated 2009/11/30
In underdoped cuprates, Tc is thought to be determined by Cooper pair phase fluctuations because of the small superfluid density ns. Experimentally, Tc is found to scale with ns. The fluctuation-exchange approximation (FLEX) in its standard form fails to predict this behavior of Tc since it does not include phase fluctuations. We therefore extend the FLEX to include them selfconsistently. We present results for Tc[ns,x], where x is the doping.