Journal article

Magnetic moment evolution and spin freezing in doped BaFe 2 As 2

  • Pelliciari, Jonathan Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, Villigen PSI,Switzerland - Department of Physics, Massachusetts Institute of Technology, Cambridge, USA
  • 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
  • Ishii, Kenji Synchrotron Radiation Research Center, National Institutes for Quantum and Radiological Technology, Hyogo, Japan
  • Zhang, Chenglin Department of Physics and Astronomy, Rice University, Houston, USA
  • Dai, Pengcheng Department of Physics and Astronomy, Rice University, Houston, USA
  • Chen, Gen Fu Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China
  • Xing, Lingyi Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China
  • Wang, Xiancheng Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China
  • Jin, Changqing Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China - Collaborative Innovation Center for Quantum Matters, Beijing, China
  • Ding, Hong Beijing National Lab for Condensed Matter Physics, Institute of Physics, Beijing, China
  • Werner, Philipp Department of Physics, University of Fribourg, Switzerland
  • Schmitt, Thorsten Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, Villigen PSI,Switzerland
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    14.08.2017
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.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/306082
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