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Berlin 2018 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 42: Charge Order

TT 42.8: Talk

Tuesday, March 13, 2018, 12:15–12:30, HFT-FT 131

Three-Dimensional Fermi Surface of 2H-NbSe2 - Implications for the Mechanism of Charge Density Waves — •Roland Hott1, Frank Weber1, Rolf Heid1, Leonid L. Lev2, Thorsten Schmitt2, and Vladimir N. Strocov21Institute for Solid State Physics, Karlsruhe Institute of Technology, D-76021 Karlsruhe, Germany — 2Paul Scherrer Institut, Swiss Light Source, CH-5232 Villigen PSI, Switzerland

We investigated 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.

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