Journal article

Dramatic effective mass reduction driven by a strong potential of competing periodicity

  • Monney, Claude Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland - Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, Villigen PSI, Switzerland
  • Schwier, Eike Fabian Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Garnier, Michael G. Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Battaglia, C. EPFL, Institute of Microengineering, Photovoltaics and Thin Film Electronics Laboratory, Neuchâtel, Switzerland
  • Mariotti, Nicolas Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Didiot, Clément Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Cercellier, H. Institut Néel, CNRS-UJF-BP, Grenoble, France
  • Marcus, J. Institut Néel, CNRS-UJF-BP, Grenoble, France
  • Berger, H. EPFL, Institut de Physique de la Matière Condensée, Lausanne, Switzerland
  • Titov, A. N. Institute of Metal Physics UrD RAS - Ekaterinburg, Russia - Institute of Metallurgy UrD RAS - Amundsen, Ekaterinburg, Russia
  • Beck, Hans Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Aebi, Philipp Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
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    01.12.2010
Published in:
  • Europhysics Letters. - 2010, vol. 92, no. 4, p. 47003
English We present angle-resolved photoemission experiments on 1T-TiSe₂ at temperatures ranging from 13 K to 288 K. The data evidence a dramatic renormalization of the conduction band below 100 K, whose origin can be related to the new potential responsible for the charge density wave phase at low temperature in this system. The renormalization translates into a substantial effective mass reduction of the dominant charge carriers and this observation is thus in opposition to the common belief that strong interactions produce heavier quasiparticles through an increased effective mass.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/301771
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