Disorder engineering and conductivity dome in ReS2 with electrolyte gating

Abstract

Atomically thin rhenium disulphide (ReS2) is a member of the transition metal dichalcogenide (TMDC) family of materials characterized by weak interlayer coupling and a distorted 1T structure. Here, we report on the electrical transport study of mono- and multilayer ReS2 with polymer electrolyte gating. We find that the conductivity of monolayer ReS2 is completely suppressed at high carrier densities, an unusual feature unique to monolayers, making ReS2 the first example of such a material. While thicker flakes of ReS2 also exhibit a conductivity dome and an insulator-metal-insulator sequence, they do not show a complete conductivity suppression at high doping densities. Using dual-gated devices, we can distinguish the gate-induced doping from the electrostatic disorder induced by the polymer electrolyte itself. Theoretical calculations and a transport model indicate that the observed conductivity suppression can be explained by a combination of a narrow conduction band and Anderson localization due to electrolyte-induced disorder.

Submitted version

References in corpus (4)

• Anderson Transitions
• Electrostatically Induced Superconductivity at the Surface of WS${}_2$
• A high-mobility electronic system at an electrolyte-gated oxide surface
• Electronic Transport in Graphene with Aggregated Hydrogen Adatoms

Cited by in corpus (8)

• Highly-Oriented Atomically Thin Ambipolar MoSe${}_2$ Grown by Molecular Beam Epitaxy
• Tuning magnetic and transport properties in quasi-2D (Mn${}_{1-x}$Ni${}_x$)${}_2$P${}_2$S${}_6$ single crystals
• Ionic gating in metallic superconductors: A brief review
• Doping controlled Fano resonance in bilayer 1T${}^{\prime }$-ReS${}_2$: Raman experiments and first-principles theoretical analysis
• Anomalous metallic phase in molybdenum disulphide induced via gate-driven organic ion intercalation
• Strong band-filling-dependence of the scattering lifetime in gated MoS2 nanolayers induced by the opening of intervalley scattering channels
• Electroluminescence from indirect band gap semiconductor ReS${}_2$
• Dual Universality and Unconventional Phase Diagram of a Clean 2D Superconductor with Tunable Disorders