Journal article

Macroscopic phase segregation in superconducting K0.73Fe1.67Se₂ as seen by muon spin rotation and infrared spectroscopy

  • Wang, Chen Nan Department of Physics and Fribourg Centre for Nanomaterials, University of Fribourg, Switzerland
  • Maršik, Premysl Department of Physics and Fribourg Centre for Nanomaterials, University of Fribourg, Switzerland
  • Schuster, Roman Department of Physics and Fribourg Centre for Nanomaterials, University of Fribourg, Switzerland
  • Dubroka, Adam Department of Physics and Fribourg Centre for Nanomaterials, University of Fribourg, Switzerland - Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Brno, Czech Republic
  • Rössle, Matthias Department of Physics and Fribourg Centre for Nanomaterials, University of Fribourg, Switzerland
  • Niedermayer, Ch. Laboratory for Neutron Scattering, Paul Scherrer Institut, Villigen, Switzerland
  • Varma, G. D. Department of Physics, Indian Institute of Technology Roorkee, India
  • Wang, A. F. Department of Physics, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, China
  • Chen, X. H. Department of Physics, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, China
  • Wolf, T. Karlsruhe Institut für Technologie, Institut für Festkörperphysik, Germany
  • Bernhard, Christian Department of Physics and Fribourg Centre for Nanomaterials, University of Fribourg, Switzerland
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    01.06.2012
Published in:
  • Physical Review B - Condensed matter and materials physics. - 2012, vol. 85, no. 21, p. 214503
English Using muon spin rotation and infrared spectroscopy, we investigated the recently discovered superconductor K0.73Fe1.67Se₂ with Tc≈32 K. We show that the combined data can be consistently described in terms of a macroscopically phase-segregated state with a matrix of ∼88% volume fraction that is insulating and strongly magnetic and inclusions with an ∼12% volume fraction, which are metallic, superconducting, and nonmagnetic. The electronic properties of the latter, in terms of the normal state plasma frequency and the superconducting condensate density, appear to be similar as in other iron selenide or arsenide superconductors.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
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Persistent URL
https://folia.unifr.ch/unifr/documents/302501
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