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Detection of a Superconducting Phase in a Two-Atom Layer of Hexagonal Ga Film Grown on Semiconducting GaN(0001)

Journal Article


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Abstract

  • The recent observation of the superconducting state at atomic scale has motivated the pursuit of exotic

    condensed phases in two-dimensional (2D) systems. Here we report on a superconducting phase in twomonolayer

    crystalline Ga films epitaxially grown on wide-band-gap semiconductor GaN(0001). This phase

    exhibits a hexagonal structure and only 0.552 nm in thickness, nevertheless, brings about a superconducting

    transition temperature Tc as high as 5.4 K, confirmed by in situ scanning tunneling

    spectroscopy and ex situ electrical magnetotransport and magnetization measurements. The anisotropy

    of critical magnetic field and Berezinski-Kosterlitz-Thouless-like transition are observed, typical for the 2D

    superconductivity. Our results demonstrate a novel platform for exploring atomic-scale 2D superconductors,

    with great potential for understanding the interface superconductivity

Authors

  •   Zhang, Huimin (external author)
  •   Sun, Yi (external author)
  •   Li, Wei (external author)
  •   Peng, Jun (external author)
  •   Song, Canli (external author)
  •   Xing, Ying (external author)
  •   Zhang, Qinghua (external author)
  •   Guan, Jia-Qi (external author)
  •   Li, Zhi
  •   Zhao, Yanfei (external author)
  •   Ji, Shuaihua (external author)
  •   Wang, Lili (external author)
  •   He, Ke (external author)
  •   Chen, Xi (external author)
  •   Gu, Lin (external author)
  •   Ling, Langsheng (external author)
  •   Tian, Mingliang (external author)
  •   Li, Lian (external author)
  •   Xie, X. C (external author)
  •   Liu, Jianping (external author)
  •   Yang, Hui (external author)
  •   Xue, Qi-Kun (external author)
  •   Wang, Jian (external author)
  •   Ma, Xu-Cun (external author)

Publication Date

  • 2015

Citation

  • Zhang, H., Sun, Y., Li, W., Peng, J., Song, C., Xing, Y., Zhang, Q., Guan, J., Li, Z., Zhao, Y., Ji, S., Wang, L., He, K., Chen, X., Gu, L., Ling, L., Tian, M., Li, L., Xie, X. C., Liu, J., Yang, H., Xue, Q., Wang, J. & Ma, X. (2015). Detection of a Superconducting Phase in a Two-Atom Layer of Hexagonal Ga Film Grown on Semiconducting GaN(0001). Physical Review Letters, 114 107003-1-107003-5.

Scopus Eid

  • 2-s2.0-84925431151

Ro Full-text Url

  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3627&context=aiimpapers

Ro Metadata Url

  • http://ro.uow.edu.au/aiimpapers/2582

Start Page

  • 107003-1

End Page

  • 107003-5

Volume

  • 114

Place Of Publication

  • United States

Abstract

  • The recent observation of the superconducting state at atomic scale has motivated the pursuit of exotic

    condensed phases in two-dimensional (2D) systems. Here we report on a superconducting phase in twomonolayer

    crystalline Ga films epitaxially grown on wide-band-gap semiconductor GaN(0001). This phase

    exhibits a hexagonal structure and only 0.552 nm in thickness, nevertheless, brings about a superconducting

    transition temperature Tc as high as 5.4 K, confirmed by in situ scanning tunneling

    spectroscopy and ex situ electrical magnetotransport and magnetization measurements. The anisotropy

    of critical magnetic field and Berezinski-Kosterlitz-Thouless-like transition are observed, typical for the 2D

    superconductivity. Our results demonstrate a novel platform for exploring atomic-scale 2D superconductors,

    with great potential for understanding the interface superconductivity

Authors

  •   Zhang, Huimin (external author)
  •   Sun, Yi (external author)
  •   Li, Wei (external author)
  •   Peng, Jun (external author)
  •   Song, Canli (external author)
  •   Xing, Ying (external author)
  •   Zhang, Qinghua (external author)
  •   Guan, Jia-Qi (external author)
  •   Li, Zhi
  •   Zhao, Yanfei (external author)
  •   Ji, Shuaihua (external author)
  •   Wang, Lili (external author)
  •   He, Ke (external author)
  •   Chen, Xi (external author)
  •   Gu, Lin (external author)
  •   Ling, Langsheng (external author)
  •   Tian, Mingliang (external author)
  •   Li, Lian (external author)
  •   Xie, X. C (external author)
  •   Liu, Jianping (external author)
  •   Yang, Hui (external author)
  •   Xue, Qi-Kun (external author)
  •   Wang, Jian (external author)
  •   Ma, Xu-Cun (external author)

Publication Date

  • 2015

Citation

  • Zhang, H., Sun, Y., Li, W., Peng, J., Song, C., Xing, Y., Zhang, Q., Guan, J., Li, Z., Zhao, Y., Ji, S., Wang, L., He, K., Chen, X., Gu, L., Ling, L., Tian, M., Li, L., Xie, X. C., Liu, J., Yang, H., Xue, Q., Wang, J. & Ma, X. (2015). Detection of a Superconducting Phase in a Two-Atom Layer of Hexagonal Ga Film Grown on Semiconducting GaN(0001). Physical Review Letters, 114 107003-1-107003-5.

Scopus Eid

  • 2-s2.0-84925431151

Ro Full-text Url

  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3627&context=aiimpapers

Ro Metadata Url

  • http://ro.uow.edu.au/aiimpapers/2582

Start Page

  • 107003-1

End Page

  • 107003-5

Volume

  • 114

Place Of Publication

  • United States