Evidence of Mott physics in iron pnictides from x-ray spectroscopy
Abstract
The existence of large instantaneous local magnetic moments in paramagnetic phases is a direct signature of Mott localization. In order to track the doping evolution of fluctuating local moments in iron-based superconductors, we jointly use two fast probes, x-ray emission and absorption spectroscopies. Exploring K- and Cr-hole-doped BaF e 2 A s 2 , we also find a systematic increase in the local moment with hole-doping, in contrast with inelastic neutron scattering measurements, which suggest an opposite trend. The results support the theoretical scenario in which a Mott insulating state that would be realized for half-filled conduction bands has an influence throughout the phase diagram of these iron pnictides.
- Authors:
-
[5];
- European Synchrotron Radiation Facility (ESRF), Grenoble (France)
- Max Planck Inst. for Solid State Research, Stuttgart (Germany)
- Karlsruhe Inst. of Technology (KIT) (Germany)
- Democritos National Simulation Centre and International School for Advanced Studies (SISSA), Trieste (Italy)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Toronto, ON (Canada)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1376599
- Alternate Identifier(s):
- OSTI ID: 1372543
- Grant/Contract Number:
- AC05-00OR22725; PHY11-25915
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 96; Journal Issue: 4; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Lafuerza, S., Gretarsson, H., Hardy, F., Wolf, T., Meingast, C., Giovannetti, G., Capone, M., Sefat, A. S., Kim, Y. -J., Glatzel, P., and de' Medici, L. Evidence of Mott physics in iron pnictides from x-ray spectroscopy. United States: N. p., 2017.
Web. doi:10.1103/PhysRevB.96.045133.
Lafuerza, S., Gretarsson, H., Hardy, F., Wolf, T., Meingast, C., Giovannetti, G., Capone, M., Sefat, A. S., Kim, Y. -J., Glatzel, P., & de' Medici, L. Evidence of Mott physics in iron pnictides from x-ray spectroscopy. United States. https://doi.org/10.1103/PhysRevB.96.045133
Lafuerza, S., Gretarsson, H., Hardy, F., Wolf, T., Meingast, C., Giovannetti, G., Capone, M., Sefat, A. S., Kim, Y. -J., Glatzel, P., and de' Medici, L. Mon .
"Evidence of Mott physics in iron pnictides from x-ray spectroscopy". United States. https://doi.org/10.1103/PhysRevB.96.045133. https://www.osti.gov/servlets/purl/1376599.
@article{osti_1376599,
title = {Evidence of Mott physics in iron pnictides from x-ray spectroscopy},
author = {Lafuerza, S. and Gretarsson, H. and Hardy, F. and Wolf, T. and Meingast, C. and Giovannetti, G. and Capone, M. and Sefat, A. S. and Kim, Y. -J. and Glatzel, P. and de' Medici, L.},
abstractNote = {The existence of large instantaneous local magnetic moments in paramagnetic phases is a direct signature of Mott localization. In order to track the doping evolution of fluctuating local moments in iron-based superconductors, we jointly use two fast probes, x-ray emission and absorption spectroscopies. Exploring K- and Cr-hole-doped BaF e 2 A s 2 , we also find a systematic increase in the local moment with hole-doping, in contrast with inelastic neutron scattering measurements, which suggest an opposite trend. The results support the theoretical scenario in which a Mott insulating state that would be realized for half-filled conduction bands has an influence throughout the phase diagram of these iron pnictides.},
doi = {10.1103/PhysRevB.96.045133},
journal = {Physical Review B},
number = 4,
volume = 96,
place = {United States},
year = {Mon Jul 24 00:00:00 EDT 2017},
month = {Mon Jul 24 00:00:00 EDT 2017}
}
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