Spectromicroscopy of electronic phase separation in KxFe 2-ySe2 superconductor

M. Bendele, A. Barinov, B. Joseph, D. Innocenti, A. Iadecola, A. Bianconi, H. Takeya, Y. Mizuguchi, Y. Takano, T. Noji, T. Hatakeda, Y. Koike, M. Horio, A. Fujimori, D. Ootsuki, T. Mizokawa, N. L. Saini*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


Structural phase separation in A x Fe2-ySe2 system has been studied by different experimental techniques, however, it should be important to know how the electronic uniformity is influenced, on which length scale the electronic phases coexist, and what is their spatial distribution. Here, we have used novel scanning photoelectron microscopy (SPEM) to study the electronic phase separation in K x Fe2-ySe2, providing a direct measurement of the topological spatial distribution of the different electronic phases. The SPEM results reveal a peculiar interconnected conducting filamentary phase that is embedded in the insulating texture. The filamentary structure with a particular topological geometry could be important for the high T c superconductivity in the presence of a phase with a large magnetic moment in A x Fe2-ySe2 materials.

Original languageEnglish
Article number5592
JournalScientific reports
Publication statusPublished - 2014 Jul 7
Externally publishedYes

ASJC Scopus subject areas

  • General


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