Structural evidence against current-induced destruction of charge-ordering in manganese oxides

TL;DR

This study uses high-resolution x-ray scattering to show that charge ordering in manganese oxides remains stable under current bias, challenging the idea that non-linear conduction is caused by charge order destruction.

Contribution

The paper provides direct structural evidence that current flow does not destabilize charge ordering in manganese oxides, contradicting previous hypotheses.

Findings

Charge ordered structure remains unchanged under current bias

Non-linear conduction is not due to charge order destabilization

Charge ordering is robust against applied current

Abstract

High-resolution x-ray scattering, in the presence of an applied current, has been used for studying the stability of the charge ordered phase of manganese oxides upon current biasing. We find that the charge ordered structure is unchanged when a current is flowing in the sample. Such a result indicates that the non-linear conduction observed in charge ordered manganites can not be ascribed to a current-induced destabilisation of charge ordering.