Journal article

Doping nature of native defects in 1T−TiSe₂

  • Hildebrand, Baptiste 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
  • Novello, A. M. Département de Physique de la Matière Condensée, University of Geneva, Switzerland
  • Monney, Gaël Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Scarfato, A. Département de Physique de la Matière Condensée, University of Geneva, Switzerland
  • Ubaldini, A. Département de Physique de la Matière Condensée, University of Geneva, Switzerland
  • Berger, Helmuth Institut de Génie Atomique, Ecole Polytechnique Fédérale de Lausanne, Switzerland
  • Bowler, D. R. London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, UK
  • Renner, Christoph Département de Physique de la Matière Condensée, University of Geneva, Switzerland
  • Aebi, Philipp Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
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    14.05.2014
Published in:
  • Physical Review Letters. - 2014, vol. 112, no. 19, p. 197001
English The transition-metal dichalcogenide 1T−TiSe₂is a quasi-two-dimensional layered material with a charge density wave (CDW) transition temperature of TCDW≈200  K. Self-doping effects for crystals grown at different temperatures introduce structural defects, modify the temperature-dependent resistivity, and strongly perturbate the CDW phase. Here, we study the structural and doping nature of such native defects combining scanning tunneling microscopy or spectroscopy and ab initio calculations. The dominant native single atom dopants we identify in our single crystals are intercalated Ti atoms, Se vacancies, and Se substitutions by residual iodine and oxygen.
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/303748
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