Two energy gaps and Fermi surface 'arcs' in NbSe2

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dc.creatorBorisenko, S. V.
dc.creatorKordyuk, A. A.
dc.creatorZabolotnyy, V. B.
dc.creatorInosov, D. S.
dc.creatorEvtushinsky, D.
dc.creatorBuechner, B.
dc.creatorYaresko, A. N.
dc.creatorVarykhalov, A.
dc.creatorFollath, R.
dc.creatorEberhardt, W.
dc.creatorPatthey, L.
dc.creatorBerger, H.
dc.date2009-04-21
dc.date.accessioned2026-07-07T13:06:53Z
dc.date.available2026-07-07T13:06:53Z
dc.descriptionUsing angle-resolved photoemission spectroscopy (ARPES), we report on the direct observation of the energy gap in 2H-NbSe2 caused by the charge-density waves (CDW). The gap opens in the regions of the momentum space connected by the CDW vectors, which implies a nesting mechanism of CDW formation. In remarkable analogy with the pseudogap in cuprates, the detected energy gap also exists in the normal state (T>T0) where it breaks the Fermi surface into 'arcs', it is non-monotonic as a function of temperature with a local minimum at the CDW transition temperature (T0) and it forestalls the superconducting gap by excluding the nested portions of the Fermi surface from participating in superconductivity.
dc.descriptionRelated work http://www.ifw-dresden.de/institutes/iff/research/SC/arpes
dc.identifierhttps://arxiv.org/abs/0904.3277
dc.identifierhttp://arxiv.org/abs/0904.3277
dc.identifierPhys. Rev. Lett. 102 166402 (2009)
dc.identifierdoi:10.1103/PhysRevLett.102.166402
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/227922
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleTwo energy gaps and Fermi surface 'arcs' in NbSe2
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