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

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...

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Bibliographic Details
Published in:arXiv.org 2019-11
Main Authors: Moon, Byoung Hee, Han, Gang Hee, Radonjić, Miloš M, Ji, Hyunjin, Dobrosavljević, Vladimir
Format: Article
Language:English
Subjects:
Bilayers
Correlation analysis
Electrons
Graphene
Insulators
Metal-insulator transition
Transition metal compounds
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Summary: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
ISSN:2331-8422
DOI:10.48550/arxiv.1911.02772