Title: Single crystal growth and characterization of tetragonal FeSe1-x superconductors
Authors: Chareev, Dmitriy
Osadchii, Evgeniy
Kuzmicheva, Tatiana
Lin, Jiunn-Yuan
Kuzmichev, Svetoslav
Volkova, Olga
Vasiliev, Alexander
Institute of Physics
Issue Date: 2013
Abstract: 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 x 4 x 0.1 mm(3) 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 T-c = 9.4 K. Multiple Andreev reflections spectroscopy pointed to the existence of two-gap superconductivity with the gap values Delta(L) = 2.4 +/- 0.2 meV and Delta(S) = 0.75 +/- 0.1 meV at 4.2 K.
URI: http://hdl.handle.net/11536/21279
ISSN: 1466-8033
DOI: 10.1039/c2ce26857d
Volume: 15
Issue: 10
Begin Page: 1989
End Page: 1993
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