Thermodynamic transitions in inhomogeneous cuprate superconductors

Details Thermodynamic transitions in inhomogeneous cuprate superconductors Thermodynamic transitions in inhomogeneous cuprate superconductors

2006-09-13

arxiv.org/abs/cond-mat/0609305v1

Physics

Condensed Matter

Superconductivity

4 pages, 6 figures, submitted to Phys. Rev. B

Scientific paper

Scanning tunneling spectroscopy studies on Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ suggest the presence of electronic inhomogeneity with a large spatial variation in gap size. Andersen {\it et al} have modelled this variation by assuming a spatially-varying pairing interaction. We show that their calculated specific heat is incompatible with the experimental data which exhibit narrow transitions. This calls into question the now-common assumption of gap and pairing inhomogeneity.

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