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

Enze Zhang, Jinhua Zhi, Yi-Chao Zou, Zefang Ye, Linfeng Ai, Jiacheng Shi, Ce Huang, Shanshan Liu, Zehao Lin, Xinyuan Zheng, Ning Kang, Hongqi Xu, Wei Wang, Liang He, Jin Zou, Jinyu Liu, Zhiqiang Mao and Faxian Xiu ()
Additional contact information
Enze Zhang: Fudan University
Jinhua Zhi: Peking University
Yi-Chao Zou: The University of Queensland
Zefang Ye: Fudan University
Linfeng Ai: Fudan University
Jiacheng Shi: Fudan University
Ce Huang: Fudan University
Shanshan Liu: Fudan University
Zehao Lin: Fudan University
Xinyuan Zheng: Fudan University
Ning Kang: Peking University
Hongqi Xu: Peking University
Wei Wang: Nanjing University
Liang He: Nanjing University
Jin Zou: The University of Queensland
Jinyu Liu: Tulane University
Zhiqiang Mao: Tulane University
Faxian Xiu: Fudan University

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: 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) Ta2PdS5 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.

Date: 2018
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-018-07123-y Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-07123-y

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-018-07123-y

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().