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Direct Observation of Nodes and Twofold Symmetry in FeSe Superconductor

Journal Article


Abstract


  • We investigated the electron-pairing mechanism in an iron-based superconductor, iron selenide

    (FeSe), using scanning tunneling microscopy and spectroscopy. Tunneling conductance spectra of

    stoichiometric FeSe crystalline films in their superconducting state revealed evidence for a gap

    function with nodal lines. Electron pairing with twofold symmetry was demonstrated by direct

    imaging of quasiparticle excitations in the vicinity of magnetic vortex cores, Fe adatoms, and Se

    vacancies. The twofold pairing symmetry was further supported by the observation of striped

    electronic nanostructures in the slightly Se-doped samples. The anisotropy can be explained in

    terms of the orbital-dependent reconstruction of electronic structure in FeSe.

UOW Authors


  •   Song, Canli (external author)
  •   Wang, Yi-Lin (external author)
  •   Cheng, Peng (external author)
  •   Jiang, Yeping (external author)
  •   Li, Wei (external author)
  •   Zhang, Tong (external author)
  •   Li, Zhi
  •   He, Ke (external author)
  •   Wang, Lili (external author)
  •   Jia, Jin-Feng (external author)
  •   Hung, Hsiang-Hsuan (external author)
  •   Wu, Congjun (external author)
  •   Ma, Xu-Cun (external author)
  •   Chen, Xi (external author)
  •   Xue, Qi-Kun (external author)

Publication Date


  • 2011

Citation


  • Song, C., Wang, Y., Cheng, P., Jiang, Y., Li, W., Zhang, T., Li, Z., He, K., Wang, L., Jia, J., Hung, H., Wu, C., Ma, X., Chen, X. & Xue, Q. (2011). Direct Observation of Nodes and Twofold Symmetry in FeSe Superconductor. Science, 332 1410-1413.

Scopus Eid


  • 2-s2.0-79959355573

Number Of Pages


  • 3

Start Page


  • 1410

End Page


  • 1413

Volume


  • 332

Place Of Publication


  • United States

Abstract


  • We investigated the electron-pairing mechanism in an iron-based superconductor, iron selenide

    (FeSe), using scanning tunneling microscopy and spectroscopy. Tunneling conductance spectra of

    stoichiometric FeSe crystalline films in their superconducting state revealed evidence for a gap

    function with nodal lines. Electron pairing with twofold symmetry was demonstrated by direct

    imaging of quasiparticle excitations in the vicinity of magnetic vortex cores, Fe adatoms, and Se

    vacancies. The twofold pairing symmetry was further supported by the observation of striped

    electronic nanostructures in the slightly Se-doped samples. The anisotropy can be explained in

    terms of the orbital-dependent reconstruction of electronic structure in FeSe.

UOW Authors


  •   Song, Canli (external author)
  •   Wang, Yi-Lin (external author)
  •   Cheng, Peng (external author)
  •   Jiang, Yeping (external author)
  •   Li, Wei (external author)
  •   Zhang, Tong (external author)
  •   Li, Zhi
  •   He, Ke (external author)
  •   Wang, Lili (external author)
  •   Jia, Jin-Feng (external author)
  •   Hung, Hsiang-Hsuan (external author)
  •   Wu, Congjun (external author)
  •   Ma, Xu-Cun (external author)
  •   Chen, Xi (external author)
  •   Xue, Qi-Kun (external author)

Publication Date


  • 2011

Citation


  • Song, C., Wang, Y., Cheng, P., Jiang, Y., Li, W., Zhang, T., Li, Z., He, K., Wang, L., Jia, J., Hung, H., Wu, C., Ma, X., Chen, X. & Xue, Q. (2011). Direct Observation of Nodes and Twofold Symmetry in FeSe Superconductor. Science, 332 1410-1413.

Scopus Eid


  • 2-s2.0-79959355573

Number Of Pages


  • 3

Start Page


  • 1410

End Page


  • 1413

Volume


  • 332

Place Of Publication


  • United States