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Tuning electronic correlations in transition metal pnictides: Chemistry beyond the valence count

  • Razzoli, Elia Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Matt, Christian E. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Laboratory for Solid State Physics, ETH Zürich, Switzerland
  • Kobayashi, M. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Department of Applied Chemistry, School of Engineering, University of Tokyo, Japan
  • Wang, X.-P. Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, China
  • Strocov, V. N. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland
  • Roekeghem, A. van Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, China - Centre de Physique Theorique, Ecole Polytechnique, Palaiseau, France
  • Biermann, Silke Centre de Physique Theorique, Ecole Polytechnique, Palaiseau, France - Collège de France, Paris, France - European Theoretical Synchrotron Facility, Europe
  • Plumb, N. C. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland
  • Radovic, M. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland
  • Schmitt, T. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland
  • Capan, C. Department of Physics and Astronomy, University of California Irvine, USA
  • Fisk, Z. Department of Physics and Astronomy, University of California Irvine, USA
  • Richard, P. Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, China - Collaborative Innovation Center of Quantum Matter, Beijing, China
  • Ding, H. Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, China - Collaborative Innovation Center of Quantum Matter, Beijing, China
  • Aebi, Philipp Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
  • Mesot, J. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Laboratory for Solid State Physics, ETH Zürich, Switzerland - Institut de la Matiere Complexe, EPF Lausanne, Switzerland
  • Shi, Ming Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland
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    03.06.2015
Published in:
  • Physical Review B. - 2015, vol. 91, no. 21, p. 214502
English The effects of electron-electron correlations on the low-energy electronic structure and their relationship with unconventional superconductivity are central aspects in the research on iron-based pnictide superconductors. Here we use soft x-ray angle-resolved photoemission spectroscopy to study how electronic correlations evolve in different chemically substituted iron pnictides. We find that correlations are intrinsically related to the effective filling of the correlated orbitals, rather than to the filling obtained by valence counting. Combined density functional theory and dynamical mean-field theory calculations capture these effects, reproducing the experimentally observed trend in the correlation strength. The occupation-driven trend in the electronic correlation reported in our paper supports and extends the recently proposed connection between cuprate and pnictide phase diagrams.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
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Persistent URL
https://folia.unifr.ch/unifr/documents/304595
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