Phase diagram of superconducting vortex ratchet motion in a superlattice with noncentrosymmetry

Shengyao Li, Lijuan Zhang, Ke Huang, Chen Ye, Tingjing Xing, Liu Yang, Zherui Yang, Qiang Zhu, Bo Sun, Xueyan Wang, and X. Renshaw Wang (王骁)
Phys. Rev. B 106, 224513 – Published 19 December 2022
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Abstract

Ratchet motion of superconducting vortices, which is a directional flow of vortices in superconductors, is highly useful for exploring quantum phenomena and developing superconducting devices, such as superconducting diode and microwave antenna. However, because of the challenges in the quantitative characterization of the dynamic motion of vortices, a phase diagram of the vortex ratchet motion is still missing, especially in the superconductors with low dimensional structures. Here we establish a quantitative phase diagram of the vortex ratchet motion in a highly anisotropic superlattice superconductor, (SnS)1.17NbS2, using nonreciprocal magnetotransport. The (SnS)1.17NbS2, which possesses a layered atomic structure and noncentrosymmetry, exhibits nonreciprocal magnetotransport in a magnetic field perpendicular and parallel to the plane, which is considered a manifest of ratchet motion of superconducting vortices. We demonstrated that the ratchet motion is responsive to current excitation, magnetic field, and thermal perturbation. Furthermore, we extrapolated a giant nonreciprocal coefficient (γ), which quantitatively describes the magnitude of the vortex ratchet motion, and eventually established phase diagrams of the ratchet motion of the vortices with a quantitative description. Last, we propose that the ratchet motion originates from the coexistence of pancake vortices and Josephson vortices. The phase diagrams are desirable for controlling the vortex motion in superlattice superconductors and developing next-generation energy-efficient superconducting devices.

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  • Received 22 June 2022
  • Revised 23 October 2022
  • Accepted 18 November 2022

DOI:https://doi.org/10.1103/PhysRevB.106.224513

©2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Shengyao Li1, Lijuan Zhang2, Ke Huang1, Chen Ye1, Tingjing Xing3, Liu Yang4, Zherui Yang1, Qiang Zhu5,6, Bo Sun2,7, Xueyan Wang1,*, and X. Renshaw Wang (王骁)1,8,†

  • 1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
  • 2Tsinghua-Berkeley Shenzhen Institute and Shenzhen Geim Graphene Center, Tsinghua University, Shenzhen, Guangdong 518055, China
  • 3Murray Edwards College, University of Cambridge, Huntingdon Rd, Cambridge CB3 0DF, United Kingdom
  • 4Raffles Institution, 1 Raffles Institution Lane, Singapore 575954, Singapore
  • 5Institute of Materials Research and Engineering (IMRE), A*STAR, 2 Fusionopolis Way, Innovis, Singapore 138634, Singapore
  • 6School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
  • 7Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Guangdong Provincial Key Laboratory of Thermal Management Engineering and Materials, Shenzhen, Guangdong 518055, China
  • 8School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore

  • *xueyan.wang@ntu.edu.sg
  • renshaw@ntu.edu.sg

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Issue

Vol. 106, Iss. 22 — 1 December 2022

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