High-pressure effects on superconducting properties and crystal structure of Bi-based layered superconductor La2O2Bi3Ag0.6Sn0.4S6

Supeng Liu; Ryo Matsumoto; Rajveer Jha; Aichi Yamashita; Saori I. Kawaguchi; Yosuke Goto; Yoshihiko Takano; Yoshikazu Mizuguchi

doi:10.1088/1361-648x/abe81b

arXiv · 2011.13532

High-pressure effects on superconducting properties and crystal structure of Bi-based layered superconductor La2O2Bi3Ag0.6Sn0.4S6

Supeng Liu·Ryo Matsumoto·Rajveer Jha·Aichi Yamashita·Saori I. Kawaguchi·Yosuke Goto·Yoshihiko Takano·Yoshikazu Mizuguchi

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Abstract

The effects of pressure on the superconducting properties of a Bi-based layered superconductor La2O2Bi3Ag0.6Sn0.4S6, which possesses a four-layer-type conducting layer, have been studied through the electrical resistance and magnetic susceptibility measurements. The crystal structure under pressure was examined using synchrotron X-ray diffraction at SPring-8. In the low-pressure regime, bulk superconductivity with a transition temperature Tc of ~ 4.5 K was induced by pressure, which was achieved by in-plane chemical pressure effect owing to the compression of the tetragonal structure. In the high-pressure regime above 6.4 GPa, a structural symmetry lowering was observed, and superconducting transitions with a Tc ~ 8 K were observed. Our results suggest the possible commonality on the factor essential for Tc in Bi-based superconductors with two-layer-type and four-layer-type conducting layers.

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Supeng Liu, Ryo Matsumoto, Rajveer Jha, Aichi Yamashita, Saori I. Kawaguchi, Yosuke Goto, Yoshihiko Takano, Yoshikazu Mizuguchi. 2020-11-27. High-pressure effects on superconducting properties and crystal structure of Bi-based layered superconductor La2O2Bi3Ag0.6Sn0.4S6. https://doi.org/10.1088/1361-648x/abe81b

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