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Visualizing the elongated vortices in γ -Ga nanostrips

Journal Article


Abstract


  • We study the magnetic response of superconducting γ -Ga via low temperature scanning tunneling microscopy

    and spectroscopy. The magnetic vortex cores rely substantially on the Ga geometry, and exhibit an unexpectedly

    large axial elongation with aspect ratio up to 40 in rectangular Ga nanostrips (width l < 100 nm). This is in stark

    contrast with the isotropic circular vortex core in a larger round-shaped Ga island. We suggest that the unusual

    elongated vortices in Ga nanostrips originate from geometric confinement effect probably via the strong repulsive

    interaction between the vortices and Meissner screening currents at the sample edge. Our finding provides novel

    conceptual insights into the geometrical confinement effect on magnetic vortices and forms the basis for the

    technological applications of superconductors.

UOW Authors


  •   Zhang, Hui-Min (external author)
  •   Li, Zi-Xiang (external author)
  •   Peng, Jun (external author)
  •   Song, Canli (external author)
  •   Guan, Jia-Qi (external author)
  •   Li, Zhi
  •   Wang, Lili (external author)
  •   He, Ke (external author)
  •   Ji, Shuaihua (external author)
  •   Chen, Xi (external author)
  •   Yao, Hong (external author)
  •   Ma, Xu-Cun (external author)
  •   Xue, Qi-Kun (external author)

Publication Date


  • 2016

Geographic Focus


Citation


  • Zhang, H., Li, Z., Peng, J., Song, C., Guan, J., Li, Z., Wang, L., He, K., Ji, S., Chen, X., Yao, H., Ma, X. & Xue, Q. (2016). Visualizing the elongated vortices in γ -Ga nanostrips. Physical Review B: Condensed Matter and Materials Physics, 93 020501-1-020501-5.

Scopus Eid


  • 2-s2.0-84955481515

Start Page


  • 020501-1

End Page


  • 020501-5

Volume


  • 93

Abstract


  • We study the magnetic response of superconducting γ -Ga via low temperature scanning tunneling microscopy

    and spectroscopy. The magnetic vortex cores rely substantially on the Ga geometry, and exhibit an unexpectedly

    large axial elongation with aspect ratio up to 40 in rectangular Ga nanostrips (width l < 100 nm). This is in stark

    contrast with the isotropic circular vortex core in a larger round-shaped Ga island. We suggest that the unusual

    elongated vortices in Ga nanostrips originate from geometric confinement effect probably via the strong repulsive

    interaction between the vortices and Meissner screening currents at the sample edge. Our finding provides novel

    conceptual insights into the geometrical confinement effect on magnetic vortices and forms the basis for the

    technological applications of superconductors.

UOW Authors


  •   Zhang, Hui-Min (external author)
  •   Li, Zi-Xiang (external author)
  •   Peng, Jun (external author)
  •   Song, Canli (external author)
  •   Guan, Jia-Qi (external author)
  •   Li, Zhi
  •   Wang, Lili (external author)
  •   He, Ke (external author)
  •   Ji, Shuaihua (external author)
  •   Chen, Xi (external author)
  •   Yao, Hong (external author)
  •   Ma, Xu-Cun (external author)
  •   Xue, Qi-Kun (external author)

Publication Date


  • 2016

Geographic Focus


Citation


  • Zhang, H., Li, Z., Peng, J., Song, C., Guan, J., Li, Z., Wang, L., He, K., Ji, S., Chen, X., Yao, H., Ma, X. & Xue, Q. (2016). Visualizing the elongated vortices in γ -Ga nanostrips. Physical Review B: Condensed Matter and Materials Physics, 93 020501-1-020501-5.

Scopus Eid


  • 2-s2.0-84955481515

Start Page


  • 020501-1

End Page


  • 020501-5

Volume


  • 93