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arXiv · 1911.02772

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

Byoung Hee Moon·Gang Hee Han·Miloš M. Radonjić·Hyunjin Ji·Vladimir Dobrosavljević
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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

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Byoung Hee Moon, Gang Hee Han, Miloš M. Radonjić, Hyunjin Ji, Vladimir Dobrosavljević. 2019-11-11. Quantum critical scaling for finite temperature Mott-like metal-insulator crossover in a few layered-MoS$_2$. https://doi.org/10.1103/physrevb.102.245424

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