Novel Layered Iridate Ba7Ir3O13+{\delta} Thin Films with Colossal Permittivity

TL;DR

This paper reports the discovery of Ba7Ir3O13+δ thin films exhibiting colossal permittivity (~10^4) at room temperature, attributed to internal barrier layer capacitance at atomically thin domain boundaries, opening new avenues for CP material design.

Contribution

It introduces a new class of CP materials based on atomically thin domain boundary engineering in Ba7Ir3O13+δ thin films.

Findings

Colossal permittivity (~10^4) observed at room temperature.

Internal barrier layer capacitance effect identified as the cause.

Potential for designing novel CP materials via boundary engineering.

Abstract

Ba7Ir3O13+{\delta} in thin film form is discovered. These films are characterized by colossal permittivity (CP) ~104 at room temperature, attributable to the colossal internal barrier layer capacitance effect at atomically thin domain boundaries. These findings suggest a new route to seeking novel CP materials through designing atomically thin domain boundaries.