Pressure-induced enhancement of superconductivity and structural transition in BiS2-Layered LaO1-xFxBiS2

Takahiro Tomita; Masaya Ebata; Hideto Soeda; Hiroki Takahashi; Hiroshi Fujihisa; Yoshito Gotoh; Yoshikazu Mizuguchi; Hiroki Izawa; Osuke Miura; Satoshi Demura; Keita Deguchi; Yoshihiko Takano

doi:10.7566/JPSJ.83.063704

Pressure-induced enhancement of superconductivity and structural transition in BiS₂-Layered LaO_1-xF_xBiS₂

Takahiro Tomita, Masaya Ebata, Hideto Soeda, Hiroki Takahashi, Hiroshi Fujihisa, Yoshito Gotoh, Yoshikazu Mizuguchi, Hiroki Izawa, Osuke Miura, Satoshi Demura, Keita Deguchi, Yoshihiko Takano

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

113 Citations (Scopus)

Abstract

BiS₂-based LaO_1-xF_xBiS₂ (x = 0.5) becomes superconductive at T_c = 2.5 K. Electrical resistivity and magnetization measurements are performed under pressure to determine the pressure dependence of the superconducting transition temperature T_c up to 18 GPa. We observe that T_c abruptly increases from 2.5 to 10.7K at a pressure of 0.7 GPa. According to high-pressure X-ray diffraction measurements of LaO_1-xF_xBiS₂ (x = 0 and 0.5), a structural phase transition from tetragonal to monoclinic also occurs at ∼0.8 GPa. We consider that the pressure-induced enhancement of superconductivity for LaO_1-xF_xBiS₂ is caused by the structural phase transition.

Original language	English
Article number	063704
Journal	Journal of the Physical Society of Japan
Volume	83
Issue number	6
DOIs	https://doi.org/10.7566/JPSJ.83.063704
Publication status	Published - 15 Jun 2014
Externally published	Yes

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title = "Pressure-induced enhancement of superconductivity and structural transition in BiS2-Layered LaO1-xFxBiS2",

abstract = "BiS2-based LaO1-xFxBiS2 (x = 0.5) becomes superconductive at Tc = 2.5 K. Electrical resistivity and magnetization measurements are performed under pressure to determine the pressure dependence of the superconducting transition temperature Tc up to 18 GPa. We observe that Tc abruptly increases from 2.5 to 10.7K at a pressure of 0.7 GPa. According to high-pressure X-ray diffraction measurements of LaO1-xFxBiS2 (x = 0 and 0.5), a structural phase transition from tetragonal to monoclinic also occurs at ∼0.8 GPa. We consider that the pressure-induced enhancement of superconductivity for LaO1-xFxBiS2 is caused by the structural phase transition.",

author = "Takahiro Tomita and Masaya Ebata and Hideto Soeda and Hiroki Takahashi and Hiroshi Fujihisa and Yoshito Gotoh and Yoshikazu Mizuguchi and Hiroki Izawa and Osuke Miura and Satoshi Demura and Keita Deguchi and Yoshihiko Takano",

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T1 - Pressure-induced enhancement of superconductivity and structural transition in BiS2-Layered LaO1-xFxBiS2

AU - Tomita, Takahiro

AU - Ebata, Masaya

AU - Soeda, Hideto

AU - Takahashi, Hiroki

AU - Fujihisa, Hiroshi

AU - Gotoh, Yoshito

AU - Mizuguchi, Yoshikazu

AU - Izawa, Hiroki

AU - Miura, Osuke

AU - Demura, Satoshi

AU - Deguchi, Keita

AU - Takano, Yoshihiko

PY - 2014/6/15

Y1 - 2014/6/15

N2 - BiS2-based LaO1-xFxBiS2 (x = 0.5) becomes superconductive at Tc = 2.5 K. Electrical resistivity and magnetization measurements are performed under pressure to determine the pressure dependence of the superconducting transition temperature Tc up to 18 GPa. We observe that Tc abruptly increases from 2.5 to 10.7K at a pressure of 0.7 GPa. According to high-pressure X-ray diffraction measurements of LaO1-xFxBiS2 (x = 0 and 0.5), a structural phase transition from tetragonal to monoclinic also occurs at ∼0.8 GPa. We consider that the pressure-induced enhancement of superconductivity for LaO1-xFxBiS2 is caused by the structural phase transition.

AB - BiS2-based LaO1-xFxBiS2 (x = 0.5) becomes superconductive at Tc = 2.5 K. Electrical resistivity and magnetization measurements are performed under pressure to determine the pressure dependence of the superconducting transition temperature Tc up to 18 GPa. We observe that Tc abruptly increases from 2.5 to 10.7K at a pressure of 0.7 GPa. According to high-pressure X-ray diffraction measurements of LaO1-xFxBiS2 (x = 0 and 0.5), a structural phase transition from tetragonal to monoclinic also occurs at ∼0.8 GPa. We consider that the pressure-induced enhancement of superconductivity for LaO1-xFxBiS2 is caused by the structural phase transition.

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Pressure-induced enhancement of superconductivity and structural transition in BiS₂-Layered LaO_1-xF_xBiS₂

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