Magnetic moment evolution and spin freezing in doped BaFe 2 As 2
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Pelliciari, Jonathan
Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, Villigen PSI,Switzerland - Department of Physics, Massachusetts Institute of Technology, Cambridge, USA
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Huang, Yaobo
Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, Villigen PSI,Switzerland - Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China
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Ishii, Kenji
Synchrotron Radiation Research Center, National Institutes for Quantum and Radiological Technology, Hyogo, Japan
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Zhang, Chenglin
Department of Physics and Astronomy, Rice University, Houston, USA
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Dai, Pengcheng
Department of Physics and Astronomy, Rice University, Houston, USA
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Chen, Gen Fu
Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China
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Xing, Lingyi
Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China
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Wang, Xiancheng
Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China
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Jin, Changqing
Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China - Collaborative Innovation Center for Quantum Matters, Beijing, China
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Ding, Hong
Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China
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Werner, Philipp
Department of Physics, University of Fribourg, Switzerland
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Schmitt, Thorsten
Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, Villigen PSI,Switzerland
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Published in:
- Scientific Reports. - 2017, vol. 7, no. 1, p. 8003
English
Fe-K β X-ray emission spectroscopy measurements reveal an asymmetric doping dependence of the magnetic moments μbare in electron- and hole-doped BaFe2As2. At low temperature, μbare is nearly constant in hole-doped samples, whereas it decreases upon electron doping. Increasing temperature substantially enhances μbare in the hole-doped region, which is naturally explained by the theoretically predicted crossover into a spin-frozen state. Our measurements demonstrate the importance of Hund’s-coupling and electronic correlations, especially for hole-doped BaFe2As2, and the inadequacy of a fully localized or fully itinerant description of the 122 family of Fe pnictides.
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Faculty
- Faculté des sciences et de médecine
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Department
- Département de Physique
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Language
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Classification
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Physics
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License
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License undefined
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Identifiers
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Persistent URL
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https://folia.unifr.ch/unifr/documents/306082
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