Unravelling strong electronic interlayer and intralayer correlations in a transition metal dichalcogenide.

ABSTRACT: Electronic correlations play important roles in driving exotic phenomena in condensed matter physics. They determine low-energy properties through high-energy bands well-beyond optics. Great effort has been made to understand low-energy excitations such as low-energy excitons in transition metal dichalcogenides (TMDCs), however their high-energy bands and interlayer correlation remain mysteries. Herewith, by measuring temperature- and polarization-dependent complex dielectric and loss functions of bulk molybdenum disulphide from near-infrared to soft X-ray, supported with theoretical calculations, we discover unconventional soft X-ray correlated-plasmons with low-loss, and electronic transitions that reduce dimensionality and increase correlations, accompanied with significantly modified l

SUBMITTER: Whitcher TJ 

PROVIDER: S-EPMC8632915 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature