Skip to main content
placeholder image

Interface charge doping effects on superconductivity of single-unit-cell FeSe films on SrTiO3 substrates

Journal Article


Abstract


  • We prepare single-unit-cell FeSe films on insulating SrTiO3 substrates by molecular beam epitaxy and

    investigate the evolution of their superconducting properties with annealing by in situ scanning tunneling

    microscopy and scanning tunneling spectroscopy and ex situ transport measurements. We find that through

    an annealing process, the superconductivity of 1-uc FeSe films on SrTiO3 substrates develops with the formation

    of stoichiometric FeSe films and is further enhanced by charge transfer from SrTiO3 substrates to FeSe films.

    Moreover, the superconductivity is independent of the bulk property of the SrTiO3 substrate, regardless of whether

    it is insulating or conductive. Our results reveal that the high-temperature superconductivity of 1-uc FeSe films

    on SrTiO3 substrates indeed occurs at the FeSe/SrTiO3 interface, where the electron doping at FeSe films plays

    an important role in this interfacial superconductivity.

UOW Authors


  •   Zhang, Wenhao (external author)
  •   Li, Zhi
  •   Li, Fangsen (external author)
  •   Zhang, Huimin (external author)
  •   Peng, Jun (external author)
  •   Tang, Chenjia (external author)
  •   Wang, Qingyan (external author)
  •   He, Ke (external author)
  •   Chen, Xi (external author)
  •   Wang, Lili (external author)
  •   Ma, Xu-Cun (external author)
  •   Xue, Qi-Kun (external author)

Publication Date


  • 2014

Geographic Focus


Citation


  • Zhang, W., Li, Z., Li, F., Zhang, H., Peng, J., Tang, C., Wang, Q., He, K., Chen, X., Wang, L., Ma, X. & Xue, Q. (2014). Interface charge doping effects on superconductivity of single-unit-cell FeSe films on SrTiO3 substrates. Physical Review B: Condensed Matter and Materials Physics, 89 060506-1-060506-6.

Scopus Eid


  • 2-s2.0-84897744229

Start Page


  • 060506-1

End Page


  • 060506-6

Volume


  • 89

Place Of Publication


  • United States

Abstract


  • We prepare single-unit-cell FeSe films on insulating SrTiO3 substrates by molecular beam epitaxy and

    investigate the evolution of their superconducting properties with annealing by in situ scanning tunneling

    microscopy and scanning tunneling spectroscopy and ex situ transport measurements. We find that through

    an annealing process, the superconductivity of 1-uc FeSe films on SrTiO3 substrates develops with the formation

    of stoichiometric FeSe films and is further enhanced by charge transfer from SrTiO3 substrates to FeSe films.

    Moreover, the superconductivity is independent of the bulk property of the SrTiO3 substrate, regardless of whether

    it is insulating or conductive. Our results reveal that the high-temperature superconductivity of 1-uc FeSe films

    on SrTiO3 substrates indeed occurs at the FeSe/SrTiO3 interface, where the electron doping at FeSe films plays

    an important role in this interfacial superconductivity.

UOW Authors


  •   Zhang, Wenhao (external author)
  •   Li, Zhi
  •   Li, Fangsen (external author)
  •   Zhang, Huimin (external author)
  •   Peng, Jun (external author)
  •   Tang, Chenjia (external author)
  •   Wang, Qingyan (external author)
  •   He, Ke (external author)
  •   Chen, Xi (external author)
  •   Wang, Lili (external author)
  •   Ma, Xu-Cun (external author)
  •   Xue, Qi-Kun (external author)

Publication Date


  • 2014

Geographic Focus


Citation


  • Zhang, W., Li, Z., Li, F., Zhang, H., Peng, J., Tang, C., Wang, Q., He, K., Chen, X., Wang, L., Ma, X. & Xue, Q. (2014). Interface charge doping effects on superconductivity of single-unit-cell FeSe films on SrTiO3 substrates. Physical Review B: Condensed Matter and Materials Physics, 89 060506-1-060506-6.

Scopus Eid


  • 2-s2.0-84897744229

Start Page


  • 060506-1

End Page


  • 060506-6

Volume


  • 89

Place Of Publication


  • United States