Temperature-dependent Fermi surface of 2H-TaSe2 driven by competing density wave order fluctuations

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dc.creatorInosov, D. S.
dc.creatorEvtushinsky, D. V.
dc.creatorZabolotnyy, V. B.
dc.creatorKordyuk, A. A.
dc.creatorBuechner, B.
dc.creatorFollath, R.
dc.creatorBerger, H.
dc.creatorBorisenko, S. V.
dc.date2008-07-24
dc.date2008-12-24
dc.date.accessioned2026-07-07T12:54:05Z
dc.date.available2026-07-07T12:54:05Z
dc.descriptionTemperature evolution of the 2H-TaSe2 Fermi surface (FS) is studied by high-resolution angle-resolved photoemission spectroscopy (ARPES). 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, explaining the puzzling reopening of the pseudogap observed in the normal state of both transition metal dichalcogenides and high-Tc cuprates.
dc.descriptionChanges since v1: paper extended, Fig. 2 added, references updated
dc.identifierhttps://arxiv.org/abs/0807.3929
dc.identifierhttp://arxiv.org/abs/0807.3929
dc.identifierPhys. Rev. B 79, 125112 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.125112
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/223806
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleTemperature-dependent Fermi surface of 2H-TaSe2 driven by competing density wave order fluctuations
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