Peak effects in the kagome superconductors CsV3Sb5 and Cs(V0.93Nb0.07)3Sb5

Chunlei Wang; Yuki Hirota; Lubin Wang; Ryosuke Sakagami; Yongkai Li; Xiaolei Yi; Wenjie Li; Yangsong Chen; Cheng Yu; Zhiwei Wang; Tsuyoshi Tamegai

doi:10.1103/PhysRevB.109.024514

Peak effects in the kagome superconductors CsV3Sb5 and Cs(V0.93Nb0.07)3Sb5

Chunlei Wang, Yuki Hirota, Lubin Wang, Ryosuke Sakagami, Yongkai Li, Xiaolei Yi, Wenjie Li, Yangsong Chen, Cheng Yu, Zhiwei Wang, Tsuyoshi Tamegai

School of Physics

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

1 Citation (Scopus)

Abstract

The effect of 3 MeV proton irradiation on the superconductivity of CsV3Sb5 and Cs(V0.93Nb0.07)3Sb5 has been investigated by resistivity and magnetization measurements. The critical transition temperature Tc increases from 3.2 to 4.4 K after proton irradiation for CsV3Sb5 single crystals. Besides the enhanced critical current density, we observe a broad magnetization peak in the proton-irradiated CsV3Sb5 single crystals, which can be attributed to the enhancement of vortex pinning induced by irradiation. We find the magnetization peak close to the upper critical field Hc2 in Cs(V0.93Nb0.07)3Sb5 single crystals, which should come from the softening of the flux line lattice. The Tc is slightly suppressed after proton irradiation in Cs(V0.93Nb0.07)3Sb5 single crystals at the present irradiation doses. The vortex phase diagrams have been constructed for the kagome superconductors Cs(V0.93Nb0.07)3Sb5 and proton-irradiated CsV3Sb5 based on the obtained data.

Original language	English
Article number	024514
Journal	Physical Review B
Volume	109
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.109.024514
Publication status	Published - 1 Jan 2024

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title = "Peak effects in the kagome superconductors CsV3Sb5 and Cs(V0.93Nb0.07)3Sb5",

abstract = "The effect of 3 MeV proton irradiation on the superconductivity of CsV3Sb5 and Cs(V0.93Nb0.07)3Sb5 has been investigated by resistivity and magnetization measurements. The critical transition temperature Tc increases from 3.2 to 4.4 K after proton irradiation for CsV3Sb5 single crystals. Besides the enhanced critical current density, we observe a broad magnetization peak in the proton-irradiated CsV3Sb5 single crystals, which can be attributed to the enhancement of vortex pinning induced by irradiation. We find the magnetization peak close to the upper critical field Hc2 in Cs(V0.93Nb0.07)3Sb5 single crystals, which should come from the softening of the flux line lattice. The Tc is slightly suppressed after proton irradiation in Cs(V0.93Nb0.07)3Sb5 single crystals at the present irradiation doses. The vortex phase diagrams have been constructed for the kagome superconductors Cs(V0.93Nb0.07)3Sb5 and proton-irradiated CsV3Sb5 based on the obtained data.",

author = "Chunlei Wang and Yuki Hirota and Lubin Wang and Ryosuke Sakagami and Yongkai Li and Xiaolei Yi and Wenjie Li and Yangsong Chen and Cheng Yu and Zhiwei Wang and Tsuyoshi Tamegai",

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doi = "10.1103/PhysRevB.109.024514",

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T1 - Peak effects in the kagome superconductors CsV3Sb5 and Cs(V0.93Nb0.07)3Sb5

AU - Wang, Chunlei

AU - Hirota, Yuki

AU - Wang, Lubin

AU - Sakagami, Ryosuke

AU - Li, Yongkai

AU - Yi, Xiaolei

AU - Li, Wenjie

AU - Chen, Yangsong

AU - Yu, Cheng

AU - Wang, Zhiwei

AU - Tamegai, Tsuyoshi

PY - 2024/1/1

Y1 - 2024/1/1

N2 - The effect of 3 MeV proton irradiation on the superconductivity of CsV3Sb5 and Cs(V0.93Nb0.07)3Sb5 has been investigated by resistivity and magnetization measurements. The critical transition temperature Tc increases from 3.2 to 4.4 K after proton irradiation for CsV3Sb5 single crystals. Besides the enhanced critical current density, we observe a broad magnetization peak in the proton-irradiated CsV3Sb5 single crystals, which can be attributed to the enhancement of vortex pinning induced by irradiation. We find the magnetization peak close to the upper critical field Hc2 in Cs(V0.93Nb0.07)3Sb5 single crystals, which should come from the softening of the flux line lattice. The Tc is slightly suppressed after proton irradiation in Cs(V0.93Nb0.07)3Sb5 single crystals at the present irradiation doses. The vortex phase diagrams have been constructed for the kagome superconductors Cs(V0.93Nb0.07)3Sb5 and proton-irradiated CsV3Sb5 based on the obtained data.

AB - The effect of 3 MeV proton irradiation on the superconductivity of CsV3Sb5 and Cs(V0.93Nb0.07)3Sb5 has been investigated by resistivity and magnetization measurements. The critical transition temperature Tc increases from 3.2 to 4.4 K after proton irradiation for CsV3Sb5 single crystals. Besides the enhanced critical current density, we observe a broad magnetization peak in the proton-irradiated CsV3Sb5 single crystals, which can be attributed to the enhancement of vortex pinning induced by irradiation. We find the magnetization peak close to the upper critical field Hc2 in Cs(V0.93Nb0.07)3Sb5 single crystals, which should come from the softening of the flux line lattice. The Tc is slightly suppressed after proton irradiation in Cs(V0.93Nb0.07)3Sb5 single crystals at the present irradiation doses. The vortex phase diagrams have been constructed for the kagome superconductors Cs(V0.93Nb0.07)3Sb5 and proton-irradiated CsV3Sb5 based on the obtained data.

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U2 - 10.1103/PhysRevB.109.024514

DO - 10.1103/PhysRevB.109.024514

M3 - Article

AN - SCOPUS:85183947322

SN - 2469-9950

VL - 109

JO - Physical Review B

JF - Physical Review B

IS - 2

M1 - 024514

ER -

Peak effects in the kagome superconductors CsV3Sb5 and Cs(V0.93Nb0.07)3Sb5

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