A novel mechanism of charge density wave in a transition metal dichalcogenide

Details A novel mechanism of charge density wave in a transition metal dichalcogenide A novel mechanism of charge density wave in a transition metal dichalcogenide

2006-12-03

arxiv.org/abs/cond-mat/0612064v3

PRL 99, 216404 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages and 4 figures

Scientific paper

10.1103/PhysRevLett.99.216404

Charge density wave, or CDW, is usually associated with Fermi surfaces nesting. We here report a new CDW mechanism discovered in a 2H-structured transition metal dichalcogenide, where the two essential ingredients of CDW are realized in very anomalous ways due to the strong-coupling nature of the electronic structure. Namely, the CDW gap is only partially open, and charge density wavevector match is fulfilled through participation of states of the large Fermi patch, while the straight FS sections have secondary or negligible contributions.

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