### Abstract

Original language | English |
---|---|

Journal | Nature communications |

Volume | 9 |

Issue number | 1 |

DOIs | |

State | Published - 2018 |

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### Cite this

*Nature communications*,

*9*(1). https://doi.org/10.1038/s41467-018-07123-y

}

*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.

Research output: Contribution to journal › Article

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

PY - 2018

Y1 - 2018

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

DO - 10.1038/s41467-018-07123-y

M3 - Article

C2 - 30405120

VL - 9

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

IS - 1

ER -