# Disordered Mott-Hubbard Physics in Nanoparticle Solids: Persistent Gap Across the Disorder-localized-to-Mott-localized Transition

## TL;DR

This paper introduces a new simulation tool and theoretical analysis to understand the persistent electronic gap in nanoparticle solids across disorder and Mott localization transitions.

## Contribution

The study develops HINTS, a hierarchical transport simulator, and applies Dynamical Mean Field Theory to analyze disorder and correlation effects in nanoparticle solids.

## Key findings

- HINTS accurately models nanoparticle solid transport properties.
- The phase diagrams from HINTS and DMFT are consistent.
- The persistent gap remains across the disorder-localized-to-Mott-localized transition.

## Abstract

We show that Nanoparticle (NP) solids are an exciting platform to seek new insights into the disordered Mott-Hubbard physics. We developed a "Hierarchical Nanoparticle Transport Simulator" (HINTS), which builds from localized states to describe the Disorder-localized and Mott-localized phases, and the transitions out of these localized phases. We also studied the interplay between correlations and disorder in the corresponding multi-orbital Hubbard model at and away from integer filling by Dynamical Mean Field Theory. This approach is complementary to HINTS, as it builds from the metallic phase of the NP solid. The mobility scenarios and phase diagrams produced by the two methods are strikingly similar, and account for the mobilities measured in NP solids.