# Disorder and superfluid density in overdoped cuprate superconductors

## TL;DR

This paper models the superfluid density in overdoped cuprate superconductors considering impurity effects, showing results consistent with experimental observations of T_c correlation and linear temperature dependence.

## Contribution

It introduces a self-consistent t-matrix approach within BCS theory to calculate superfluid density in dirty d-wave superconductors with realistic Fermi surface parameters.

## Key findings

- Superfluid density correlates with T_c.
- Superfluid density varies linearly with temperature.
- Model aligns with recent experimental data.

## Abstract

We calculate superfluid density for a dirty d-wave superconductor. The effects of impurity scattering are treated within the self-consistent t-matrix approximation, in weak-coupling BCS theory. Working from a realistic tight-binding parameterization of the Fermi surface, we find a superfluid density that is both correlated with T_c and linear in temperature, in good correspondence with recent experiments on overdoped La2-xSrxCuO4.