Three-dimensional quantum Griffiths singularity in bulk iron-pnictide superconductors
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866911697608900608 |
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| author | Liu, Shao-Bo Tian, Congkuan Cai, Yongqing Cui, Hang Wei, Xinjian Chen, Mantang Zhao, Yang Sui, Yuan Guan, Shuyue Jia, Shuang Zhang, Yu Feng, Ya Li, Jiankun Cui, Jian Song, Yuanjun Hao, Tingting Chen, Chaoyu Chen, Jian-Hao |
| author_facet | Liu, Shao-Bo Tian, Congkuan Cai, Yongqing Cui, Hang Wei, Xinjian Chen, Mantang Zhao, Yang Sui, Yuan Guan, Shuyue Jia, Shuang Zhang, Yu Feng, Ya Li, Jiankun Cui, Jian Song, Yuanjun Hao, Tingting Chen, Chaoyu Chen, Jian-Hao |
| contents | The quantum Griffiths singularity (QGS) is a phenomenon driven by quenched disorders that break conventional scaling invariance and result in a divergent dynamical critical exponent during quantum phase transitions (QPT). While this phenomenon has been well-documented in low-dimensional conventional superconductors and in three-dimensional (3D) magnetic metal systems, its presence in 3D superconducting systems and in unconventional high-temperature superconductors (high-Tc SCs) remains unclear. In this study, we report the observation of robust QGS in the superconductor-metal transition (SMT) of both quasi-2D and 3D anisotropic unconventional high-Tc superconductor CaFe1-xNixAsF (x < 5%) bulk single crystals, where the QGS states persist to up to 5.3 K. A comprehensive quantum phase diagram is established that delineates the 3D anisotropic QGS of SMT induced by perpendicular and parallel magnetic field. Our findings reveal the universality of QGS in 3D superconducting systems and unconventional high-Tc SCs, thereby substantially expanding the range of applicability of QGS. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_10193 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Three-dimensional quantum Griffiths singularity in bulk iron-pnictide superconductors Liu, Shao-Bo Tian, Congkuan Cai, Yongqing Cui, Hang Wei, Xinjian Chen, Mantang Zhao, Yang Sui, Yuan Guan, Shuyue Jia, Shuang Zhang, Yu Feng, Ya Li, Jiankun Cui, Jian Song, Yuanjun Hao, Tingting Chen, Chaoyu Chen, Jian-Hao Strongly Correlated Electrons Superconductivity The quantum Griffiths singularity (QGS) is a phenomenon driven by quenched disorders that break conventional scaling invariance and result in a divergent dynamical critical exponent during quantum phase transitions (QPT). While this phenomenon has been well-documented in low-dimensional conventional superconductors and in three-dimensional (3D) magnetic metal systems, its presence in 3D superconducting systems and in unconventional high-temperature superconductors (high-Tc SCs) remains unclear. In this study, we report the observation of robust QGS in the superconductor-metal transition (SMT) of both quasi-2D and 3D anisotropic unconventional high-Tc superconductor CaFe1-xNixAsF (x < 5%) bulk single crystals, where the QGS states persist to up to 5.3 K. A comprehensive quantum phase diagram is established that delineates the 3D anisotropic QGS of SMT induced by perpendicular and parallel magnetic field. Our findings reveal the universality of QGS in 3D superconducting systems and unconventional high-Tc SCs, thereby substantially expanding the range of applicability of QGS. |
| title | Three-dimensional quantum Griffiths singularity in bulk iron-pnictide superconductors |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2406.10193 |