Resistance noise in Bi_2Sr_2CaCu_2O$_{8+\delta}$

TL;DR

This study investigates resistance noise in Bi_2Sr_2CaCu_2O_{8+\delta} thin films, revealing increased noise in the underdoped regime linked to the superconductor-insulator transition, with implications for understanding pseudogap phenomena.

Contribution

It provides new insights into the origin of resistance noise in cuprate superconductors, highlighting the role of the superconductor-insulator transition in noise behavior.

Findings

Resistance noise increases in the underdoped regime.

Noise correlates with proximity to the superconductor-insulator transition.

Standard analysis suggests transition-driven noise contribution.

Abstract

The resistance noise in a Bi_2Sr_2CaCu_2O$_{8+\delta}$ thin film is found to increase strongly in the underdoped regime. While the increase of the raw resistance noise with decreasing temperature appears to roughly track the previously reported pseudogap temperature for this material, standard noise analysis rather suggests that the additional noise contribution is driven by the proximity of the superconductor-insulator transition.