First single crystal growth and structural analysis of superconducting layered bismuth oxyselenide; La(O,F)BiSe{sub 2}
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan)
- University of Yamanashi, 7-32 Miyamae, Kofu, Yamanashi 400-8511 (Japan)
Single crystals of La(O,F)BiSe{sub 2} were successfully grown for the first time by a CsCl flux method. Single crystal X-ray structural analysis clearly showed that La(O,F)BiSe{sub 2} crystallizes with space group P4/nmm (lattice parameters a=4.1408(2) Å, c=14.1096(6) Å). The structure is composed of alternating BiSe{sub 2} and La(O,F) layers. The bond distances and angles are similar to those of La(O,F)BiS{sub 2}. The bond valence sum calculation indicates the refined structure is slightly cation rich, suggesting the charge neutrality should be kept by modification of valence state of the cations. Magnetic susceptibility and resistivity measurements showed the compound is a superconductor with a transition temperature of 3.6 K, which is higher than that of as-grown La(O,F)BiS{sub 2}. - Graphical abstract: Single crystal La(O,F)BiSe{sub 2} has been prepared by a CsCl flux method. The structural analysis implies that La(O,F)BiSe{sub 2} is a potential superconductor having a higher T{sub c} under high pressure. - Highlights: • Single crystals of La(O,F)BiSe{sub 2} were grown by a CsCl flux method. • Crystal structure of La(O,F)BiSe{sub 2} was determined by single crystal X-ray analysis. • La(O,F)BiSe{sub 2} shows superconductivity with a transition temperature of 3.6 K. • Bonding nature and superconductivity of La(O,F)BiSe{sub 2} are discussed.
- OSTI ID:
- 22443470
- Journal Information:
- Journal of Solid State Chemistry, Vol. 219; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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