Faculté des sciences
Texte intégral

Fermi-surface-induced lattice distortion in NbTe2

Battaglia, Corsin ; Cercellier, Hervé ; Clerc, Florian ; Despont, Laurent ; Garnier, Michael Gunnar ; Koitzsch, Christian ; Aebi, Philipp ; Berger, Helmuth ; Forró, László ; Ambrosch-Draxl, Claudia

In: Physical Review B, 2005, vol. 72, no. 195114, p. 1-10

The origin of the monoclinic distortion and domain formation in the quasi-two-dimensional layer compound NbTe2 is investigated. Angle-resolved photoemission shows that the Fermi surface is pseudogapped over large portions of the Brillouin zone. Ab initio calculation of the electron and phonon band structure as well as the static RPA susceptibility lead us to conclude that Fermi... More

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    Title
    • Fermi-surface-induced lattice distortion in NbTe2
    Author
    • Battaglia, Corsin. Institut de Physique, Université de Neuchâtel, Switzerland
    • Cercellier, Hervé. Institut de Physique, Université de Neuchâtel, Switzerland
    • Clerc, Florian. Institut de Physique, Université de Neuchâtel, Switzerland
    • Despont, Laurent. Institut de Physique, Université de Neuchâtel, Switzerland
    • Garnier, Michael Gunnar. Institut de Physique, Université de Neuchâtel, Switzerland
    • Koitzsch, Christian. Institut de Physique, Université de Neuchâtel, Switzerland
    • Aebi, Philipp. Institut de Physique, Université de Neuchâtel, Switzerland
    • Berger, Helmuth. Institute of Physics of Complex Matter, EPFL, Lausanne, Switzerland
    • Forró, László. Institute of Physics of Complex Matter, EPFL, Lausanne, Switzerland
    • Ambrosch-Draxl, Claudia. Institut für Physik, Karl-Franzens-Universität Graz, Austria
    Document Type
    • Postprint
    Publication Date
    • 2005
    Classification
    • Physics
    OAI-PMH Identifier
    • oai:doc.rero.ch:20080319115510-TX
    Submission No.
    • 20080319115510-TX
    Summary
    The origin of the monoclinic distortion and domain formation in the quasi-two-dimensional layer compound NbTe2 is investigated. Angle-resolved photoemission shows that the Fermi surface is pseudogapped over large portions of the Brillouin zone. Ab initio calculation of the electron and phonon band structure as well as the static RPA susceptibility lead us to conclude that Fermi surface nesting and electron-phonon coupling play a key role in the lowering of the crystal symmetry and in the formation of the charge density wave phase.