First single crystal growth and structural analysis of superconducting layered bismuth oxyselenide; La(O,F)BiSe2
arXiv:1406.0734 · doi:10.1016/j.jssc.2014.07.026
Abstract
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) Ã , c = 14.1096(6) Ã ). 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.
19 pages, 4 figures, 3 tables