Signature of quantum Griffiths singularity state in a layered quasi-one-dimensional superconductor

E. Zhang, J. Zhi, Y.-C. Zou, Z. Ye, L. Ai, J. Shi, C. Huang, S. Liu, Z. Lin, X. Zheng, N. Kang, H. Xu, W. Wang, L. He, J. Zou, J. Liu, Z. Mao, F. Xiu

Research output: Contribution to journalArticle

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Abstract

Quantum Griffiths singularity was theoretically proposed to interpret the phenomenon of divergent dynamical exponent in quantum phase transitions. It has been discovered experimentally in three-dimensional (3D) magnetic metal systems and two-dimensional (2D) superconductors. But, whether this state exists in lower dimensional systems remains elusive. Here, we report the signature of quantum Griffiths singularity state in quasi-one-dimensional (1D) Ta 2 PdS 5 nanowires. The superconducting critical field shows a strong anisotropic behavior and a violation of the Pauli limit in a parallel magnetic field configuration. Current-voltage measurements exhibit hysteresis loops and a series of multiple voltage steps in transition to the normal state, indicating a quasi-1D nature of the superconductivity. Surprisingly, the nanowire undergoes a superconductor-metal transition when the magnetic field increases. Upon approaching the zero-temperature quantum critical point, the system uncovers the signature of the quantum Griffiths singularity state arising from enhanced quenched disorders, where the dynamical critical exponent becomes diverging rather than being constant. \ 2018, The Author(s).
Original languageEnglish
JournalNature communications
Volume9
Issue number1
DOIs
StatePublished - 2018

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Nanowires
Superconducting materials
signatures
Magnetic Fields
Magnetic fields
Voltage measurement
Electric current measurement
nanowires
Hysteresis loops
Superconductivity
Metals
exponents
Transition metals
magnetic metals
magnetic field configurations
Phase transitions
Phase Transition
electrical measurement
critical point
Electric potential

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Zhang, E. ; Zhi, J. ; Zou, Y.-C. ; Ye, Z. ; Ai, L. ; Shi, J. ; Huang, C. ; Liu, S. ; Lin, Z. ; Zheng, X. ; Kang, N. ; Xu, H. ; Wang, W. ; He, L. ; Zou, J. ; Liu, J. ; Mao, Z. ; Xiu, F. / Signature of quantum Griffiths singularity state in a layered quasi-one-dimensional superconductor. In: Nature communications. 2018 ; Vol. 9, No. 1.
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abstract = "Quantum Griffiths singularity was theoretically proposed to interpret the phenomenon of divergent dynamical exponent in quantum phase transitions. It has been discovered experimentally in three-dimensional (3D) magnetic metal systems and two-dimensional (2D) superconductors. But, whether this state exists in lower dimensional systems remains elusive. Here, we report the signature of quantum Griffiths singularity state in quasi-one-dimensional (1D) Ta 2 PdS 5 nanowires. The superconducting critical field shows a strong anisotropic behavior and a violation of the Pauli limit in a parallel magnetic field configuration. Current-voltage measurements exhibit hysteresis loops and a series of multiple voltage steps in transition to the normal state, indicating a quasi-1D nature of the superconductivity. Surprisingly, the nanowire undergoes a superconductor-metal transition when the magnetic field increases. Upon approaching the zero-temperature quantum critical point, the system uncovers the signature of the quantum Griffiths singularity state arising from enhanced quenched disorders, where the dynamical critical exponent becomes diverging rather than being constant. \ 2018, The Author(s).",
author = "E. Zhang and J. Zhi and Y.-C. Zou and Z. Ye and L. Ai and J. Shi and C. Huang and S. Liu and Z. Lin and X. Zheng and N. Kang and H. Xu and W. Wang and L. He and J. Zou and J. Liu and Z. Mao and F. Xiu",
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Zhang, E, Zhi, J, Zou, Y-C, Ye, Z, Ai, L, Shi, J, Huang, C, Liu, S, Lin, Z, Zheng, X, Kang, N, Xu, H, Wang, W, He, L, Zou, J, Liu, J, Mao, Z & Xiu, F 2018, 'Signature of quantum Griffiths singularity state in a layered quasi-one-dimensional superconductor', Nature communications, vol. 9, no. 1. https://doi.org/10.1038/s41467-018-07123-y

Signature of quantum Griffiths singularity state in a layered quasi-one-dimensional superconductor. / Zhang, E.; Zhi, J.; Zou, Y.-C.; Ye, Z.; Ai, L.; Shi, J.; Huang, C.; Liu, S.; Lin, Z.; Zheng, X.; Kang, N.; Xu, H.; Wang, W.; He, L.; Zou, J.; Liu, J.; Mao, Z.; Xiu, F.

In: Nature communications, Vol. 9, No. 1, 2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Signature of quantum Griffiths singularity state in a layered quasi-one-dimensional superconductor

AU - Zhang, E.

AU - Zhi, J.

AU - Zou, Y.-C.

AU - Ye, Z.

AU - Ai, L.

AU - Shi, J.

AU - Huang, C.

AU - Liu, S.

AU - Lin, Z.

AU - Zheng, X.

AU - Kang, N.

AU - Xu, H.

AU - Wang, W.

AU - He, L.

AU - Zou, J.

AU - Liu, J.

AU - Mao, Z.

AU - Xiu, F.

N1 - cited By 0

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N2 - Quantum Griffiths singularity was theoretically proposed to interpret the phenomenon of divergent dynamical exponent in quantum phase transitions. It has been discovered experimentally in three-dimensional (3D) magnetic metal systems and two-dimensional (2D) superconductors. But, whether this state exists in lower dimensional systems remains elusive. Here, we report the signature of quantum Griffiths singularity state in quasi-one-dimensional (1D) Ta 2 PdS 5 nanowires. The superconducting critical field shows a strong anisotropic behavior and a violation of the Pauli limit in a parallel magnetic field configuration. Current-voltage measurements exhibit hysteresis loops and a series of multiple voltage steps in transition to the normal state, indicating a quasi-1D nature of the superconductivity. Surprisingly, the nanowire undergoes a superconductor-metal transition when the magnetic field increases. Upon approaching the zero-temperature quantum critical point, the system uncovers the signature of the quantum Griffiths singularity state arising from enhanced quenched disorders, where the dynamical critical exponent becomes diverging rather than being constant. \ 2018, The Author(s).

AB - Quantum Griffiths singularity was theoretically proposed to interpret the phenomenon of divergent dynamical exponent in quantum phase transitions. It has been discovered experimentally in three-dimensional (3D) magnetic metal systems and two-dimensional (2D) superconductors. But, whether this state exists in lower dimensional systems remains elusive. Here, we report the signature of quantum Griffiths singularity state in quasi-one-dimensional (1D) Ta 2 PdS 5 nanowires. The superconducting critical field shows a strong anisotropic behavior and a violation of the Pauli limit in a parallel magnetic field configuration. Current-voltage measurements exhibit hysteresis loops and a series of multiple voltage steps in transition to the normal state, indicating a quasi-1D nature of the superconductivity. Surprisingly, the nanowire undergoes a superconductor-metal transition when the magnetic field increases. Upon approaching the zero-temperature quantum critical point, the system uncovers the signature of the quantum Griffiths singularity state arising from enhanced quenched disorders, where the dynamical critical exponent becomes diverging rather than being constant. \ 2018, The Author(s).

U2 - 10.1038/s41467-018-07123-y

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VL - 9

JO - Nature Communications

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SN - 2041-1723

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