Anomalous electronic susceptibility in Bi2Sr2CuO6+d and comparison with other overdoped cuprates

TL;DR

This study investigates the magnetic susceptibility of overdoped Bi2Sr2CuO6+d, revealing unusual linear temperature dependence and correlations with doping, and compares these findings with other cuprates to understand their non-conventional metallic behavior.

Contribution

It provides new insights into the anomalous magnetic susceptibility behavior in overdoped cuprates and compares these features across different materials, highlighting potential underlying electronic structures.

Findings

Susceptibility decreases with temperature in overdoped Bi2Sr2CuO6+d.

Spin susceptibility exhibits a linear temperature dependence at high temperatures.

Similar susceptibility behaviors are observed in other overdoped cuprates like LSCO, Tl-2201, and Bi-2212.

Abstract

We report magnetic susceptibility performed on overdoped Bi2Sr2CuO6+d powders as a function of oxygen doping d and temperature T. The decrease of the spin susceptibility with increasing T is confirmed. At sufficient high temperature, the spin susceptibility Chi_s presents an unusual linear temperature dependence Chi_s ~ Chi_s0 -Chi_1 T. Moreover, a linear correlation between Chi_1 and Chi_s0 for increasing hole concentration is displayed. A temperature Tchi, independent of hole doping characterizes this scaling. Comparison with other cuprates of the literature(LSCO, Tl-2201 and Bi-2212), over the same overdoped range, shows similarities with above results. These non conventional metal features will be discussed in terms of a singular narrow-band structure.