Topotactic synthesis of a new BiS2-based superconductor Bi2(O,F)S2

Abstract

A new BiS2-based superconductor Bi2(O,F)S2 was discovered. This is a layered compound consisting of alternate stacking structure of rock-salt-type BiS2 superconducting layer and fluorite-type Bi(O,F) blocking layer. Bi2(O,F)S2 was obtained as the main phase by topotactic fluorination of undoped Bi2OS2 using XeF2, which is the first topotactic synthesis of an electron-doped superconductor via reductive fluorination. With increasing F-content, a- and c-axis length increased and decreased, respectively, and Tc increased up to 5.1 K.

9 pages, 4 figures

References in corpus (1)

• Superconductivity Appears in the Vicinity of an Insulating-Like Behavior in CeO${}_{1-x}$F${}_x$BiS${}_2$

Cited by in corpus (10)

• In-plane chemical pressure essential for superconductivity in BiCh2-based (Ch: S, Se) layered structure
• Material Development and Physical Properties of BiS2-Based Layered Compounds
• Structures and Optical Absorption of Bi2OS2 and LaOBiS2
• Thermoelectric properties of new Bi-chalcogenide layered compounds
• Superconductivity and its Enhancement under High Pressure in "F-free" Single Crystals of CeOBiS${}_2$
• Growth and characterization of R(O,F)BiS2 (R = La, Ce, Pr, Nd) superconducting single crystals
• Growth and characterization of (La,Ce)OBiS2 single crystals
• Pressure Effects on Superconducting Properties of the BiS2-Based Superconductor Bi2(O,F)S2
• Growth and superconducting properties of Cd-doped La(O,F)BiS2 single crystals
• Pb Substitution Effects on Lattice and Electronic System of the BiS2-based Superconductors La(O F)BiS2