Skip to main content
placeholder image

Electronic origin of high-temperature superconductivity in single-layer FeSe superconductor

Journal Article


Abstract


  • The recent discovery of high-temperature superconductivity in iron-based compounds has

    attracted much attention . How to further increase the superconducting transition temperature

    ( Tc ) and how to understand the superconductivity mechanism are two prominent issues facing

    the current study of iron-based superconductors. The latest report of high- Tc superconductivity

    in a single-layer FeSe is therefore both surprising and signifi cant. Here we present investigations

    of the electronic structure and superconducting gap of the single-layer FeSe superconductor. Its

    Fermi surface is distinct from other iron-based superconductors, consisting only of electron-like

    pockets near the zone corner without indication of any Fermi surface around the zone centre.

    Nearly isotropic superconducting gap is observed in this strictly two-dimensional system. The

    temperature dependence of the superconducting gap gives a transition temperature Tc ~ 55 K.

    These results have established a clear case that such a simple electronic structure is compatible

    with high- Tc superconductivity in iron-based superconductors.

Authors


  •   Liu, Defa (external author)
  •   Zhang, Wenhao (external author)
  •   Mou, Daixiang (external author)
  •   He, Junfeng (external author)
  •   Ou, Yun-Bo (external author)
  •   Wang, Qingyan (external author)
  •   Li, Zhi
  •   Wang, Lili (external author)
  •   Zhao, Lin (external author)
  •   He, Shaolong (external author)
  •   Peng, Yingying (external author)
  •   Liu, Xu (external author)
  •   Chen, Chaoyu (external author)
  •   Yu, Li (external author)
  •   Liu, Guodong (external author)
  •   Dong, Xiaoli (external author)
  •   Zhang, Jun (external author)
  •   Chen, Chuangtian (external author)
  •   Xu, Zuyan (external author)
  •   Hu, Jiang-Ping (external author)
  •   Chen, Xi (external author)
  •   Ma, Xu-Cun (external author)
  •   Xue, Qi-Kun (external author)
  •   Zhou, X J. (external author)

Publication Date


  • 2012

Citation


  • Liu, D., Zhang, W., Mou, D., He, J., Ou, Y., Wang, Q., Li, Z., Wang, L., Zhao, L., He, S., Peng, Y., Liu, X., Chen, C., Yu, L., Liu, G., Dong, X., Zhang, J., Chen, C., Xu, Z., Hu, J., Chen, X., Ma, X., Xue, Q. & Zhou, X. J. (2012). Electronic origin of high-temperature superconductivity in single-layer FeSe superconductor. Nature Communications, 3 931-1-931-6.

Scopus Eid


  • 2-s2.0-84864840114

Start Page


  • 931-1

End Page


  • 931-6

Volume


  • 3

Place Of Publication


  • United Kingdom

Abstract


  • The recent discovery of high-temperature superconductivity in iron-based compounds has

    attracted much attention . How to further increase the superconducting transition temperature

    ( Tc ) and how to understand the superconductivity mechanism are two prominent issues facing

    the current study of iron-based superconductors. The latest report of high- Tc superconductivity

    in a single-layer FeSe is therefore both surprising and signifi cant. Here we present investigations

    of the electronic structure and superconducting gap of the single-layer FeSe superconductor. Its

    Fermi surface is distinct from other iron-based superconductors, consisting only of electron-like

    pockets near the zone corner without indication of any Fermi surface around the zone centre.

    Nearly isotropic superconducting gap is observed in this strictly two-dimensional system. The

    temperature dependence of the superconducting gap gives a transition temperature Tc ~ 55 K.

    These results have established a clear case that such a simple electronic structure is compatible

    with high- Tc superconductivity in iron-based superconductors.

Authors


  •   Liu, Defa (external author)
  •   Zhang, Wenhao (external author)
  •   Mou, Daixiang (external author)
  •   He, Junfeng (external author)
  •   Ou, Yun-Bo (external author)
  •   Wang, Qingyan (external author)
  •   Li, Zhi
  •   Wang, Lili (external author)
  •   Zhao, Lin (external author)
  •   He, Shaolong (external author)
  •   Peng, Yingying (external author)
  •   Liu, Xu (external author)
  •   Chen, Chaoyu (external author)
  •   Yu, Li (external author)
  •   Liu, Guodong (external author)
  •   Dong, Xiaoli (external author)
  •   Zhang, Jun (external author)
  •   Chen, Chuangtian (external author)
  •   Xu, Zuyan (external author)
  •   Hu, Jiang-Ping (external author)
  •   Chen, Xi (external author)
  •   Ma, Xu-Cun (external author)
  •   Xue, Qi-Kun (external author)
  •   Zhou, X J. (external author)

Publication Date


  • 2012

Citation


  • Liu, D., Zhang, W., Mou, D., He, J., Ou, Y., Wang, Q., Li, Z., Wang, L., Zhao, L., He, S., Peng, Y., Liu, X., Chen, C., Yu, L., Liu, G., Dong, X., Zhang, J., Chen, C., Xu, Z., Hu, J., Chen, X., Ma, X., Xue, Q. & Zhou, X. J. (2012). Electronic origin of high-temperature superconductivity in single-layer FeSe superconductor. Nature Communications, 3 931-1-931-6.

Scopus Eid


  • 2-s2.0-84864840114

Start Page


  • 931-1

End Page


  • 931-6

Volume


  • 3

Place Of Publication


  • United Kingdom