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Nanoscale superconductivity of y-Ga islands grown by molecular beam epitaxy

Journal Article


Abstract


  • We report on the preparation and superconductivity of metastable -Ga islands on Si (111) substrate. The Ga grows in a typical

    Volmer-Weber mode at a low temperature of 110 K, resulting in formation of Ga nanoislands at various sizes with the identical

    -phase. In-situ low temperature scanning tunneling spectra reveal quantized electronic states in ultrathin Ga islands. It is

    found that both the lateral size and thickness of the Ga islands strongly suppress the superconductivity. Due to substantial surface

    energy contribution, the transition temperature Tc scales inversely with the island thickness and the minimum thickness for

    the occurrence of superconductivity is calculated to be two monolayers.

UOW Authors


  •   Zhang, Huimin (external author)
  •   Peng, Jun (external author)
  •   Guan, Jia-Qi (external author)
  •   Li, Zhi
  •   Song, Canli (external author)
  •   Wang, Lili (external author)
  •   He, Ke (external author)
  •   Ma, Xu-Cun (external author)
  •   Xue, Qi-Kun (external author)

Publication Date


  • 2015

Geographic Focus


Citation


  • Zhang, H., Peng, J., Guan, J., Li, Z., Song, C., Wang, L., He, K., Ma, X. & Xue, Q. (2015). Nanoscale superconductivity of y-Ga islands grown by molecular beam epitaxy. Science China Physics, Mechanics & Astronomy, 58 (10), 107402-1-107402-5.

Scopus Eid


  • 2-s2.0-84941109925

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2581

Start Page


  • 107402-1

End Page


  • 107402-5

Volume


  • 58

Issue


  • 10

Place Of Publication


  • China

Abstract


  • We report on the preparation and superconductivity of metastable -Ga islands on Si (111) substrate. The Ga grows in a typical

    Volmer-Weber mode at a low temperature of 110 K, resulting in formation of Ga nanoislands at various sizes with the identical

    -phase. In-situ low temperature scanning tunneling spectra reveal quantized electronic states in ultrathin Ga islands. It is

    found that both the lateral size and thickness of the Ga islands strongly suppress the superconductivity. Due to substantial surface

    energy contribution, the transition temperature Tc scales inversely with the island thickness and the minimum thickness for

    the occurrence of superconductivity is calculated to be two monolayers.

UOW Authors


  •   Zhang, Huimin (external author)
  •   Peng, Jun (external author)
  •   Guan, Jia-Qi (external author)
  •   Li, Zhi
  •   Song, Canli (external author)
  •   Wang, Lili (external author)
  •   He, Ke (external author)
  •   Ma, Xu-Cun (external author)
  •   Xue, Qi-Kun (external author)

Publication Date


  • 2015

Geographic Focus


Citation


  • Zhang, H., Peng, J., Guan, J., Li, Z., Song, C., Wang, L., He, K., Ma, X. & Xue, Q. (2015). Nanoscale superconductivity of y-Ga islands grown by molecular beam epitaxy. Science China Physics, Mechanics & Astronomy, 58 (10), 107402-1-107402-5.

Scopus Eid


  • 2-s2.0-84941109925

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2581

Start Page


  • 107402-1

End Page


  • 107402-5

Volume


  • 58

Issue


  • 10

Place Of Publication


  • China