Correlation between $T_c$ and anisotropic scattering in Tl$_2$Ba$_2$CuO$_{6+\delta}$

TL;DR

This study investigates how anisotropic scattering correlates with the superconducting transition temperature in overdoped Tl$_2$Ba$_2$CuO$_{6+eta}$, revealing a linear relationship and differences between transport and quasiparticle lifetimes.

Contribution

It demonstrates a linear scaling of anisotropic scattering with $T_c$ and compares transport and quasiparticle lifetimes, linking normal state scattering to superconductivity.

Findings

Anisotropic scattering scales linearly with $T_c$.

Transport and quasiparticle lifetimes are distinct.

Normal state scattering influences superconductivity.

Abstract

Angle-dependent magnetoresistance measurements are used to determine the isotropic and anisotropic components of the transport scattering rate in overdoped Tl$_2$Ba$_2$CuO$_{6+\delta}$ for a range of $T_c$ values between 15K and 35K. The size of the anisotropic scattering term is found to scale linearly with $T_c$, establishing a link between the superconducting and normal state physics. Comparison with results from angle resolved photoemission spectroscopy indicates that the transport and quasiparticle lifetimes are distinct.