Superfluid response in electron-doped cuprate superconductors

Details Superfluid response in electron-doped cuprate superconductors Superfluid response in electron-doped cuprate superconductors

2004-07-19

arxiv.org/abs/cond-mat/0407496v3

Phys. Rev. Lett. 94, 027001 (2005)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures, title changed and references added

Scientific paper

10.1103/PhysRevLett.94.027001

We propose a weakly coupled two-band model with $d_{x^2-y^2}$ pairing symmetry to account for the anomalous temperature dependence of superfluid density $\rho_s$ in electron-doped cuprate superconductors. This model gives a unified explanation to the presence of a upward curvature in $\rho_s$ near $T_c$ and a weak temperature dependence of $\rho_s$ in low temperatures. Our work resolves a discrepancy in the interpretation of different experimental measurements and suggests that the pairing in electron-doped cuprates has predominately $d_{x^2-y^2}$ symmetry in the whole doping range.

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