2000 character limit reached
Three-dimensional Fermi surface of 2H-NbSe$_2$ - Implications for the mechanism of charge density waves (1807.08472v1)
Published 23 Jul 2018 in cond-mat.supr-con and cond-mat.str-el
Abstract: We investigate the three-dimensional electronic structure of the seminal charge-density-wave (CDW) material 2H-NbSe$_2$ 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 $k_z$ excluding a nesting-driven CDW formation based on experimental data. The 3D-like band structure of 2H-NbSe$_2$ has strong implications for the intriguing phase competition of CDW order with superconductivity.
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