Three-dimensional Fermi surface of 2H−NbSe2: Implications for the mechanism of charge density waves

We investigate the three-dimensional electronic structure of the seminal charge-density-wave (CDW) material 2H−NbSe2 by soft x-ray angle-resolved photoelectron spectroscopy and density functional theory. Our results reveal the pronounced 3D character of the electronic structure formed in the quasi-t...

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Bibliographic Details
Published in:Physical review. B 2018-06, Vol.97 (23)
Main Authors: Weber, F, Hott, R, Heid, R, Lev, L L, Caputo, M, Schmitt, T, Strocov, V N
Format: Article
Language:English
Subjects:
Charge density waves
Charge materials
Crystal structure
Density functional theory
Electronic structure
Electrons
Fermi surfaces
Nesting
Soft x rays
Superconductivity
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Summary:We investigate the three-dimensional electronic structure of the seminal charge-density-wave (CDW) material 2H−NbSe2 by soft x-ray angle-resolved photoelectron spectroscopy and density functional theory. Our results reveal the pronounced 3D character of the electronic structure formed in the quasi-two-dimensional layered crystal structure. In particular, we find a strong dispersion along kz excluding a nesting-driven CDW formation based on experimental data. The 3D-like band structure of 2H−NbSe2 has strong implications for the intriguing phase competition of CDW order with superconductivity.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.97.235122