Effect of FET geometry on charge ordering of transition metal oxides

TL;DR

This study investigates how FET geometry influences charge ordering in transition metal oxides, revealing that layer thickness affects phase stability and that charge injection can probe intrinsic phases.

Contribution

We demonstrate through simulations that FET layer thickness impacts charge order phases, providing insights into experimental probing of these phases in transition metal oxides.

Findings

Charge ordering phase diagram remains unchanged for layers >2x magnetic correlation length.

Thin layers shift charge clump phase onset to lower magnetic interaction strengths.

Thick insulating layers allow charge injection to probe intrinsic charge ordering phases.

Abstract

We examine the effect of an FET geometry on the charge ordering phase diagram of transition metal oxides using numerical simulations of a semiclassical model including long-range Coulomb fields, resulting in nanoscale pattern formation. We find that the phase diagram is unchanged for insulating layers thicker than approximately twice the magnetic correlation length. For very thin insulating layers, the onset of a charge clump phase is shifted to lower values of the strength of the magnetic dipolar interaction, and intermediate diagonal stripe and geometric phases can be suppressed. Our results indicate that, for sufficiently thick insulating layers, charge injection in an FET geometry can be used to experimentally probe the intrinsic charge ordering phases in these materials.