Inhomogeneous slowing down of spin fluctuations induced by charge stripe order in 1/8-doped lanthanum cuprates

TL;DR

This study uses NMR measurements to explore how charge stripe order in 1/8-doped lanthanum cuprates causes inhomogeneous slowing of spin fluctuations, affecting spin order and superconductivity.

Contribution

It provides new insights into the inhomogeneous spin dynamics induced by charge stripe order in 1/8-doped lanthanum cuprates.

Findings

Charge stripe order induces inhomogeneous slowing down of spin fluctuations.

Charge order competes with superconductivity.

Spin freezing is observed near charge stripe regions.

Abstract

We report $^{139}$La nuclear magnetic resonance (NMR) measurements on La$_{2-x}$Sr$_x$CuO$_4$ ($0.07\leq x \leq 0.15$) and La$_{2-x}$Ba$_x$CuO$_4$ ($x=1/8$) single crystals, focusing on the spin freezing observed in 1/8-doped lanthanum cuprates. Charge stripe order seems to induce the inhomogeneous slowing down of spin fluctuations toward spin order and compete with superconductivity.