2D orbital-like magnetic order in ${\rm La_{2-x}Sr_xCuO_4}$

TL;DR

This study reports a short-range, two-dimensional magnetic order in La2-xSrxCuO4 below 120 K, revealing a potential interaction with stripe order and the pseudogap phase in high-temperature cuprate superconductors.

Contribution

First observation of 2D, short-range magnetic order in LSCO at x=0.085, expanding understanding of magnetic phenomena in cuprates.

Findings

Magnetic order appears below 120 K in LSCO.

Order is short-range and bidimensional with ~10 Å correlation length.

Order interacts with stripe ordering and affects superconductivity.

Abstract

In high temperature copper oxides superconductors, a novel magnetic order associated with the pseudogap phase has been identified in two different cuprate families over a wide region of temperature and doping. We here report the observation below 120 K of a similar magnetic ordering in the archetypal cuprate ${\rm La_{2-x}Sr_xCuO_4}$ (LSCO) system for x=0.085. In contrast to the previous reports, the magnetic ordering in LSCO is {\it\bf only} short range with an in-plane correlation length of $\sim$ 10 \AA\ and is bidimensional (2D). Such a less pronounced order suggests an interaction with other electronic instabilities. In particular, LSCO also exhibits a strong tendency towards stripes ordering at the expense of the superconducting state.