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

Razzoli, Elia; Matt, Christian E.; Kobayashi, M.; Wang, X.-P.; Strocov, V. N.; Roekeghem, A. van; Biermann, Silke; Plumb, N. C.; Radovic, M.; Schmitt, T.; Capan, C.; Fisk, Z.; Richard, P.; Ding, H.; Aebi, Philipp; Mesot, J.; Shi, Ming

doi:10.1103/PhysRevB.91.214502

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Journal article

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

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

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