Transport in disordered monolayer molybdenum disulfide nanoflakes: evidence for inhomogeneous charge transport

TL;DR

This study reveals that charge transport in monolayer molybdenum disulfide nanoflakes is dominated by inhomogeneous puddles caused by disorder, challenging previous uniform disorder models and aiding future device development.

Contribution

It introduces a percolation-based model for charge transport in monolayer MoS2 nanoflakes, emphasizing the role of disorder-induced inhomogeneity.

Findings

Charge transport is governed by percolation through puddles.

Disorder breaks translational invariance, creating inhomogeneous charge regions.

The model explains transport behavior across various conditions.

Abstract

We study charge transport in a monolayer molybdenum disulfide nanoflake over a wide range of carrier density, temperature, and electric bias. We find that the transport is best described by a percolating picture in which the disorder breaks translational invariance, breaking the system up into a series of puddles, rather than previous pictures in which the disorder is treated as homogeneous and uniform. Our work provides insight to a unified picture of charge transport in monolayer molybdenum disulfide nanoflakes and contributes to the development of next-generation molybdenum disulfide based devices.