Evidence for Charge Glass-like Behavior in Lightly Doped La_{2-x}Sr_{x}CuO_{4} at Low Temperatures

TL;DR

This study provides evidence of charge glass-like behavior in lightly doped La_{2-x}Sr_{x}CuO_{4} at low temperatures, indicating dynamic charge ordering driven by Coulomb interactions.

Contribution

It presents experimental evidence of charge glassiness in La_{1.97}Sr_{0.03}CuO_{4} through magnetotransport and noise measurements, highlighting a new state of matter in cuprates.

Findings

Signatures of glassiness such as hysteresis and memory observed

Charge glassiness emerges below the spin glass transition temperature

Results suggest Coulomb interactions induce dynamic charge ordering

Abstract

A c-axis magnetotransport and resistance noise study in La_{1.97}Sr_{0.03}CuO_{4} reveals clear signatures of glassiness, such as hysteresis, memory, and slow, correlated dynamics, but only at temperatures (T) well below the spin glass transition temperature T_{sg}. The results strongly suggest the emergence of charge glassiness, or dynamic charge ordering, as a result of Coulomb interactions.