Single crystal growth and characterization of tetragonal FeSe1-x superconductors

Dmitriy Chareev, Evgeniy Osadchii, Tatiana Kuzmicheva, Jiunn-Yuan Lin, Svetoslav Kuzmichev, Olga Volkova, Alexander Vasiliev*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

139 Scopus citations


The plate-like single crystals of tetragonal (P4/nmm) FeSe1-x superconductors were grown using the KCl-AlCl3 flux technique which produced single crystalline tetragonal samples of about 4 × 4 × 0.1 mm3 dimensions. The energy dispersive X-ray spectroscopy established a ratio of Fe:Se = 1:0.96 ± 0.02. The resistivity and magnetization measurements revealed a sharp superconducting transition at Tc = 9.4 K. Multiple Andreev reflections spectroscopy pointed to the existence of two-gap superconductivity with the gap values ΔL = 2.4 ± 0.2 meV and ΔS = 0.75 ± 0.1 meV at 4.2 K.

Original languageEnglish
Pages (from-to)1989-1993
Number of pages5
Issue number10
StatePublished - 14 Mar 2013


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