Journal article

Electronic phase separation in the slightly underdoped iron pnictide superconductor Ba1-xKxFe₂As₂

  • Park, J. T. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Inosov, D. S. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Niedermayer, Ch. Laboratory for Neutron Scattering, ETHZ & PSI, Villigen PSI, Switzerland
  • Sun, G. L. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Haug, D. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Christensen, N. B. Laboratory for Neutron Scattering, ETHZ & PSI, Villigen PSI, Switzerland - Materials Research Department, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, Roskilde, Denmark - Nano-Science Center, Niels Bohr Institute, University of Copenhagen, Denmark
  • Dinnebier, R. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Boris, A. V. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Drew, Alan J. Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland - Physics Department, Queen Mary, University of London, United Kingdom
  • Schulz, Leander Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Shapoval, T. IFW Dresden, Institute for Metallic Materials, Germany
  • Wolff, U. IFW Dresden, Institute for Metallic Materials, Germany
  • Neu, V. IFW Dresden, Institute for Metallic Materials, Germany
  • Yang, Xiaoping Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Lin, C. T. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Keimer, B. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Hinkov, V. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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    20.04.2009
Published in:
  • Physical Review Letters. - 2009, vol. 102, no. 111, p. 117006
English Here we present a combined study of the slightly underdoped novel pnictide superconductor Ba1-xKxFe₂As₂ by means of x-ray powder diffraction, neutron scattering, muon-spin rotation (µSR), and magnetic force microscopy (MFM). Static antiferromagnetic order sets in below Tm≈70 K as inferred from the neutron scattering and zero-field-µSR data. Transverse-field µSR below Tc shows a coexistence of magnetically ordered and nonmagnetic states, which is also confirmed by MFM imaging. We explain such coexistence by electronic phase separation into antiferromagnetic and superconducting- or normal-state regions on a lateral scale of several tens of nanometers. Our findings indicate that such mesoscopic phase separation can be considered an intrinsic property of some iron pnictide superconductors.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/301192
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