# Correlation induced electron-hole asymmetry in quasi-2D iridates

## TL;DR

This paper investigates how electron-hole asymmetry in quasi-2D iridates arises from correlation effects, revealing that electron and hole doping lead to fundamentally different behaviors due to many-body configurations.

## Contribution

It provides a detailed theoretical analysis of charge carrier dynamics in iridates, highlighting the distinct effects of correlations on electrons versus holes.

## Key findings

- Electron addition forms a spin-polaron similar to cuprates.
- Hole removal involves complex many-body configurations affecting motion.
- Correlation effects cause fundamental electron-hole asymmetry in iridates.

## Abstract

We determine the motion of a charge (hole or electron) added to the Mott insulating, antiferromagnetic (AF) ground-state of quasi-2D iridates such as Ba 2 IrO 4 or Sr 2 IrO 4 . We show that correlation effects, calculated within the self-consistent Born approximation, render the hole and electron case very different. An added electron forms a spin-polaron, which closely resembles the well-known cuprates, but the situation of a removed electron is far more complex. Many-body 5d 4 configurations form which can be singlet and triplets of total angular momentum J and strongly affect the hole motion between AF sublattices. This not only has important ramifications for the interpretation of (inverse-)photoemission experiments of quasi-2D iridates but also demonstrates that the correlation physics in electron- and hole-doped iridates is fundamentally different.