Electronic phase separation in the slightly underdoped iron pnictide superconductor Ba1-xKxFe₂As₂
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Park, J. T.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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Inosov, D. S.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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Niedermayer, Ch.
Laboratory for Neutron Scattering, ETHZ & PSI, Villigen PSI, Switzerland
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Sun, G. L.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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Haug, D.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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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
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Dinnebier, R.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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Boris, A. V.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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Drew, Alan J.
Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland - Physics Department, Queen Mary, University of London, United Kingdom
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Schulz, Leander
Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
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Shapoval, T.
IFW Dresden, Institute for Metallic Materials, Germany
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Wolff, U.
IFW Dresden, Institute for Metallic Materials, Germany
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Neu, V.
IFW Dresden, Institute for Metallic Materials, Germany
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Yang, Xiaoping
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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Lin, C. T.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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Keimer, B.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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Hinkov, V.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
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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.
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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/301192
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