Quantum critical scaling for finite temperature Mott-like metal-insulator crossover in a few layered-MoS${}_2$

Abstract

The possibility of the strong electron-electron interaction driven insulating phase from the metallic phase in two-dimensions has been suggested for clean systems without intentional disorder, but its rigorous demonstration is still lacking. Here, we examine the finite-temperature transport behavior of a few layered-MoS${}_2$ material in the vicinity of the density-driven metal-insulator transition (MIT), revealing previously overlooked universal features characteristic of strongly correlated electron systems. Our scaling analysis, based on the Wigner-Mott theoretical viewpoint, conclusively demonstrates that the transition is driven by strong electron-electron interactions and not disorder, in striking resemblance to what is seen in other Mott systems. Our results provide compelling evidence that transition-metal dichalcogenides provide an ideal testing ground for the study of strong correlation physics, which should open an exciting avenue for future research, making a parallel with recent advances in twisted bilayer graphene

arXiv comment18 pages, 4 figures

References in corpus (24)

• Possible Metal/Insulator Transition at B=0 in Two Dimensions
• Metal-insulator transition in two-dimensional electron systems
• Mott Transition from a Spin Liquid to a Fermi Liquid in the Spin-Frustrated Organic Conductor kappa-(ET)2Cu2(CN)3
• Electric field scaling at a B=0 metal-insulator transition in two dimensions
• Metal-Insulator Transition in Disordered Two-Dimensional Electron Systems
• Mott transition and transport crossovers in the organic compound $\kappa -(BEDT-TTF{)}_{2}Cu[N(CN{)}_2]Cl$
• Probing the Electron States and Metal-Insulator Transition Mechanisms in Atomically Thin MoS2 Based on Vertical Heterostructures
• The Metallic-Like Conductivity of a Two-Dimensional Hole System
• Wigner crystallization and metal-insulator transition of two-dimensional holes in GaAs/AlGaAs at B=0
• Quantum Critical Transport Near the Mott Transition
• Dilute electron gas near the metal-insulator transition in two dimensions
• Finite temperature crossovers and the quantum Widom line near the Mott transition
• Flow diagram of the metal-insulator transition in two dimensions
• Coulomb Correlations and the Wigner-Mott Transition
• Bad-metal behavior reveals Mott quantum criticality in doped Hubbard models
• Control of Valley Degeneracy in MoS2 by Layer Thickness and Electric Field and Its Effect on Thermoelectric Properties
• Extended Hubbard model: Charge Ordering and Wigner-Mott transition
• Reflection symmetry at a B=0 metal-insulator transition in two dimensions
• Wigner-Mott scaling of transport near the two-dimensional metal-insulator transition
• Properties of strongly correlated two-dimensional electron gas in semiconductor layers
• Self-doping instability of the Wigner-Mott insulator
• Influence of disorder on incoherent transport near the Mott transition
• Short-range disorder effects on electronic transport in 2D semiconductor structures
• Phase diagram of the metal-insulator transition in 2D electronic systems

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• Metal-insulator transition and low-density phases in a strongly-interacting two-dimensional electron system
• Low-Temperature 2D/2D Ohmic Contacts in WSe${}_2$ Field-Effect Transistors as a Platform for the 2D Metal-Insulator Transition
• How to recognize the universal aspects of Mott criticality?
• Spin effect on the low-temperature resistivity maximum in a strongly interacting 2D electron system
• Quantum Monte Carlo study of the metal-insulator crossover in the square-lattice Hubbard model