First single crystal growth and structural analysis of superconducting layered bismuth oxyselenide; La(O,F)BiSe2

Hiroyuki Takeya; Masanori Nagao; Masashi Tanaka; Masaya Fujioka; Saleem J. Denholme; Takahide Yamaguchi; Yoshihiko Takano; Yoshitaka Matsushita

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First single crystal growth and structural analysis of superconducting layered bismuth oxyselenide; La(O,F)BiSe2

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arxiv 1406.0734 v1 pith:M73F62F3 submitted 2014-06-03 cond-mat.supr-con

Masashi Tanaka , Masanori Nagao , Yoshitaka Matsushita , Masaya Fujioka , Saleem J. Denholme , Takahide Yamaguchi , Hiroyuki Takeya , Yoshihiko Takano This is my paper · ORCID

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keywords bise2analysiscrystalsinglestructuralfirsthighershowed

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Single crystal of La(O,F)BiSe2 was successfully grown for the first time by the CsCl flux method. Single crystal X-ray structural analysis clearly showed that La(O,F)BiSe2 crystalizes with space group P4/nmm (lattice parameters a = 4.1408(2) {\AA}, c = 14.1096(6) {\AA}). The structure is composed of alternating BiSe2 and LaO layers. Magnetic susceptibility and resistivity measurements showed the superconducting transition at 3.6 K, which is higher than that of as-grown La(O,F)BiS2. The structural analysis implies that La(O,F)BiSe2 is potential superconductor having higher Tc under high pressure.

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