Journal article

Exciton Condensation Driving the Periodic Lattice Distortion of 1T-TiSe₂

  • 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
  • Battaglia, Corsin Ecole Polytechnique Fédérale de Lausanne, Institute of Microengineering, Photovoltaics and Thin Film Electronics Laboratory, Neuchâtel, Switzerland
  • Cercellier, H. Institut Néel, CNRS-UJF, Grenoble, France
  • Aebi, Philipp Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Beck, Hans Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
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    11.04.2011
Published in:
  • Physical Review Letters. - 2011, vol. 106, no. 10, p. 106404
English We address the lattice deformation of 1T-TiSe₂ within the exciton condensate phase. We show that, at low temperature, condensed excitons influence the lattice through electron-phonon interaction. It is found that at zero temperature, in the exciton condensate phase of 1T-TiSe₂, this exciton condensate exerts a force on the lattice generating ionic displacements comparable in amplitude to what is measured in experiment. This is thus the first quantitative estimation of the amplitude of the periodic lattice distortion observed in 1T-TiSe₂ as a consequence of the exciton condensate phase.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/301852
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