2008/07/31 by D. S. Inosov, D. V. Evtushinsky, V. B. Zabolotnyy +7 · 32 citations
Materials Science · Physics and Astronomy · #2D Materials and Applications #Charge (physics) #Condensed matter physics #Fermi surface #Nuclear magnetic resonance #Organic and Molecular Conductors Research #Photoemission spectroscopy #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum mechanics #Spectroscopy #X-ray photoelectron spectroscopy #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.79.125112
published in Physical Review B 79(12) (American Physical Society) · Changes since v1: paper extended, Fig. 2 added, references updated
arxiv created 2008/12/24 · openalex publication_date 2009/03/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Temperature evolution of the 2H-TaSe2 Fermi surface (FS) is studied by high-resolution angle-resolved photoemission spectroscopy. High-accuracy determination of the FS geometry was possible after measuring electron momenta and velocities along all high-symmetry directions as a function of temperature with subsequent fitting to a tight-binding model. The estimated incommensurability parameter of the nesting vector agrees with that of the incommensurate charge modulations. We observe detectable nonmonotonic temperature dependence of the FS shape, which we show to be consistent with the analogous behavior of the pseudogap. These changes in the electronic structure could stem from the competition of commensurate and incommensurate charge density wave order fluctuations and could explain the puzzling reopening of the pseudogap observed in the normal state of the transition metal dichalcogenides.