Enhancement of Superconductivity and Structural Instability by Sn Substitution in LaO0.5F0.5BiS2

Sora Kobayashi; Takeshi Hara; Kanako Noguchi; Tomoko Takeda; Ryosuke Kurihara; Atsushi Nomura; Satoshi Demura; Hiroshi Yaguchi; Hiroshi Sawa; Hideaki Sakata

doi:10.7566/JPSJ.93.024707

Enhancement of Superconductivity and Structural Instability by Sn Substitution in LaO_0.5F_0.5BiS₂

Sora Kobayashi, Takeshi Hara, Kanako Noguchi, Tomoko Takeda, Ryosuke Kurihara, Atsushi Nomura, Satoshi Demura, Hiroshi Yaguchi, Hiroshi Sawa, Hideaki Sakata

College of Science and Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Layered BiS₂-based superconductor La(O,F)BiS₂ can exhibit superconductivity via carrier doping, and its superconducting properties can be changed by applying hydrostatic or chemical pressure through elemental substitution. Single-crystal LaO_0.5F_0.5BiS₂ exhibits filamentary superconductivity with T_c of approximately 3 K. We found that the partial substitution of Bi with Sn in LaO_0.5F_0.5BiS₂ induces a structural phase transition from the P4=nmm to P2₁=m structure. Bulk superconductivity with T_c of approximately 6 K emerged near this structural phase transition. We also observed filamentary superconductivity with T_c of approximately 8 K, which was approximately three times higher than that of the unsubstituted sample. This finding provides a new route for further increasing the superconducting transition temperature of this system.

Original language	English
Article number	024707
Journal	Journal of the Physical Society of Japan
Volume	93
Issue number	2
DOIs	https://doi.org/10.7566/JPSJ.93.024707
Publication status	Published - 15 Feb 2024

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title = "Enhancement of Superconductivity and Structural Instability by Sn Substitution in LaO0.5F0.5BiS2",

abstract = "Layered BiS2-based superconductor La(O,F)BiS2 can exhibit superconductivity via carrier doping, and its superconducting properties can be changed by applying hydrostatic or chemical pressure through elemental substitution. Single-crystal LaO0.5F0.5BiS2 exhibits filamentary superconductivity with Tc of approximately 3 K. We found that the partial substitution of Bi with Sn in LaO0.5F0.5BiS2 induces a structural phase transition from the P4=nmm to P21=m structure. Bulk superconductivity with Tc of approximately 6 K emerged near this structural phase transition. We also observed filamentary superconductivity with Tc of approximately 8 K, which was approximately three times higher than that of the unsubstituted sample. This finding provides a new route for further increasing the superconducting transition temperature of this system.",

author = "Sora Kobayashi and Takeshi Hara and Kanako Noguchi and Tomoko Takeda and Ryosuke Kurihara and Atsushi Nomura and Satoshi Demura and Hiroshi Yaguchi and Hiroshi Sawa and Hideaki Sakata",

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T1 - Enhancement of Superconductivity and Structural Instability by Sn Substitution in LaO0.5F0.5BiS2

AU - Kobayashi, Sora

AU - Hara, Takeshi

AU - Noguchi, Kanako

AU - Takeda, Tomoko

AU - Kurihara, Ryosuke

AU - Nomura, Atsushi

AU - Demura, Satoshi

AU - Yaguchi, Hiroshi

AU - Sawa, Hiroshi

AU - Sakata, Hideaki

PY - 2024/2/15

Y1 - 2024/2/15

N2 - Layered BiS2-based superconductor La(O,F)BiS2 can exhibit superconductivity via carrier doping, and its superconducting properties can be changed by applying hydrostatic or chemical pressure through elemental substitution. Single-crystal LaO0.5F0.5BiS2 exhibits filamentary superconductivity with Tc of approximately 3 K. We found that the partial substitution of Bi with Sn in LaO0.5F0.5BiS2 induces a structural phase transition from the P4=nmm to P21=m structure. Bulk superconductivity with Tc of approximately 6 K emerged near this structural phase transition. We also observed filamentary superconductivity with Tc of approximately 8 K, which was approximately three times higher than that of the unsubstituted sample. This finding provides a new route for further increasing the superconducting transition temperature of this system.

AB - Layered BiS2-based superconductor La(O,F)BiS2 can exhibit superconductivity via carrier doping, and its superconducting properties can be changed by applying hydrostatic or chemical pressure through elemental substitution. Single-crystal LaO0.5F0.5BiS2 exhibits filamentary superconductivity with Tc of approximately 3 K. We found that the partial substitution of Bi with Sn in LaO0.5F0.5BiS2 induces a structural phase transition from the P4=nmm to P21=m structure. Bulk superconductivity with Tc of approximately 6 K emerged near this structural phase transition. We also observed filamentary superconductivity with Tc of approximately 8 K, which was approximately three times higher than that of the unsubstituted sample. This finding provides a new route for further increasing the superconducting transition temperature of this system.

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ER -

Enhancement of Superconductivity and Structural Instability by Sn Substitution in LaO_0.5F_0.5BiS₂

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