On the pseudogap and doping-dependent magnetic properties of La2-xSrxCu1-yZnyO4

TL;DR

This study investigates how doping levels and zinc impurities affect the magnetic susceptibility of La2-xSrxCu1-yZnyO4, revealing a strong link to the pseudogap phase and its abrupt disappearance near p ~ 0.19.

Contribution

It provides new insights into the doping-dependent magnetic response and the pseudogap's influence on impurity-induced magnetism in cuprate superconductors.

Findings

Zn-induced magnetic moment is larger in underdoped samples.

Magnetic behavior sharply decreases around p ~ 0.19.

Pseudogap presence correlates with impurity-induced magnetism.

Abstract

The effects of planar hole content, p (= x), on the uniform (q = 0) magnetic susceptibility, c(T), of La2-xSrxCu1-yZnyO4 were investigated over a wide range of Sr (x) and Zn (y) contents. A strongly p-dependent Zn-induced magnetic behavior was observed. The apparent Zn-induced magnetic moment is larger in underdoped La2-xSrxCu1-yZnyO4 and it decreases quite sharply around p ~ 0.19. It does not change much for further overdoping. This indicates a possible role of the pseudogap on the Zn induced magnetic behavior, as there is growing evidence that pseudogap vanishes quite abruptly at p ~ 0.19.