Observation of mesoscopic phase separation in KxFeySe2 by scanning microwave microscopy

Hideyuki Takahashi, Yoshinori Imai, Atsutaka Maeda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We investigated the local electric property of iron-based superconductor KxFeySe2 (x=0.8,y=1.6-2,Tc=31K) using scanning tunneling/microwave microscope. The characteristic pattern originating from mesoscopic phase separation of the metallic and the semiconducting phase was observed. From the comparison with previously reported SEM/EDS results, we identified the metallic phase and the semiconducting phase as the minor Fe-rich phase and the major K2Fe4Se5 phase, respectively.

Original languageEnglish
Article number1252814
Pages (from-to)33-35
Number of pages3
JournalPhysica C: Superconductivity and its applications
Publication statusPublished - 2015 Mar 3
Externally publishedYes


  • Iron-based superconductor
  • KFeSe
  • Scanning microwave microscope

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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