Site selectivity on chalcogen atoms in superconducting La(O,F)BiSSe

Journal Article · Mon Mar 16 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4915302· OSTI ID:22395759

Tanaka, Masashi; Matsushita, Yoshitaka; Fujioka, Masaya; Denholme, Saleem J.; Yamaguchi, Takahide; Takeya, Hiroyuki ^[1]; Yamaki, Takuma; Takano, Yoshihiko ^[1]

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1. National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan)

Single crystals of La(O,F)BiSSe were grown by using a CsCl flux method. Single crystal X-ray structural analysis reveals that the crystal structure is isostructural to the BiS{sub 2}- or BiSe{sub 2}-based compounds crystallizing with space group P4/nmm (lattice parameters a = 4.1110(2) Å, c = 13.6010(7) Å). However, the S atoms are selectively occupied at the apical site of the Bi-SSe pyramids in the superconducting layer. The single crystals show a superconducting transition at around 4.2 K in the magnetic susceptibility and resistivity measurements. The superconducting anisotropic parameter is determined to be 34–35 from its upper critical magnetic field. The anisotropy is in the same range with that of other members of the La(O,F)BiCh{sub 2} (Ch = S, Se) family under ambient pressure.

• OSTI ID: 22395759
• Journal Information: Applied Physics Letters, Vol. 106, Issue 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
ATOMS
BISMUTH SELENIDES
CESIUM CHLORIDES
CHALCOGENIDES
ELECTRIC CONDUCTIVITY
LANTHANUM SULFIDES
LATTICE PARAMETERS
LAYERS
MAGNETIC FIELDS
MAGNETIC SUSCEPTIBILITY
MONOCRYSTALS
TETRAGONAL LATTICES
X-RAY DIFFRACTION