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- W4308244181 abstract "We report on the interplay between a van Hove singularity and a charge density wave state in 2H-TaSe$_{2}$. We use angle-resolved photoemission spectroscopy to investigate changes in the Fermi surface of this material under surface doping with potassium. At high doping, we observe modifications which imply the disappearance of the $(3times 3)$ charge density wave and formation of a different correlated state. Using a tight-binding-based approach as well as an effective model, we explain our observations as a consequence of coupling between the single-particle Lifshitz transition during which the Fermi level passes a van Hove singularity and the charge density order. The high electronic density of states associated with the van Hove singularity induces a change in the periodicity of the charge density wave from the known $(3times 3)$ to a new $(2times 2)$ superlattice." @default.
- W4308244181 created "2022-11-09" @default.
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- W4308244181 date "2022-11-03" @default.
- W4308244181 modified "2023-09-27" @default.
- W4308244181 title "Controlling charge density order in 2H-TaSe$_{2}$ using a van Hove singularity" @default.
- W4308244181 doi "https://doi.org/10.48550/arxiv.2211.01780" @default.
- W4308244181 hasPublicationYear "2022" @default.
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