# Room-temperature annealing effects on the basal-plane resistivity of optimally doped YBa$_2$Cu$_3$O$_{7-\delta}$ single crystals

## TL;DR

This study shows that the basal-plane resistivity of optimally doped YBa₂Cu₃O₇−δ single crystals can be accurately modeled by s-d electron-phonon scattering, with annealing improving superconducting properties and affecting the 2D-3D crossover temperature.

## Contribution

It demonstrates the effectiveness of the s-d electron-phonon scattering model in describing resistivity and highlights how room-temperature annealing enhances superconducting transition temperature and modifies crossover behavior.

## Key findings

- Resistivity fits well with s-d electron-phonon scattering model.
- Annealing increases the superconducting transition temperature.
- The 2D-3D crossover temperature decreases after annealing.

## Abstract

We reveal that the temperature dependence of the basal-plane normal-state electrical resistance of optimally doped YBa$_2$Cu$_3$O$_{7-\delta}$ single crystals can be with great accuracy approximated within the framework of the model of s-d electron-phonon scattering. This requires taking into account the fluctuation conductivity whose contribution exponentially increases with decreasing temperature and decreases with an increase of oxygen deficiency. Room-temperature annealing improves the sample and, thus, increases the superconducting transition temperature. The temperature of the 2D-3D crossover decreases during annealing.