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Direct Observation of High-Temperature Superconductivity in One-Unit-Cell FeSe Films

Journal Article


Abstract

  • We prepared one-unit-cell (1-UC) thick FeSe films on insulating SrTiO3 substrates with non-superconducting FeTe

    protection layers by molecular beam epitaxy for ex situ studies. By direct transport and magnetic measurements,

    we provide definitive evidence for high temperature superconductivity in the 1-UC FeSe films with an onset ?C

    above 40 K and an extremely large critical current density ?C∼1.7×106 A/cm2

    at 2 K, which are much higher

    than ?C∼8 K and ?C∼104 A/cm2

    for bulk FeSe, respectively. Our work may pave the way to enhancing and

    tailoring superconductivity by interface engineering.

UOW Authors

  •   Zhang, Wenhao (external author)
  •   Sun, Yi (external author)
  •   Zhang, Jin (external author)
  •   Li, Fangsen (external author)
  •   Guo, Ming-Hua (external author)
  •   Zhao, Yanfei (external author)
  •   Zhang, Huimin (external author)
  •   Peng, Jun (external author)
  •   Xing, Ying (external author)
  •   Wang, Hui (external author)
  •   Fujita, Takeshi (external author)
  •   Hirata, Akihiko (external author)
  •   Li, Zhi (external author)
  •   Ding, Hao (external author)
  •   Tang, Chenjia (external author)
  •   Wang, Meng (external author)
  •   Wang, Qingyan (external author)
  •   He, Ke (external author)
  •   Ji, Shuaihua (external author)
  •   Chen, Xi (external author)
  •   Wang, Junfeng (external author)
  •   Xia, Zheng-Cai (external author)
  •   Li, Liang (external author)
  •   Wang, Ya-Yu (external author)
  •   Wang, Jian (external author)
  •   Wang, Lili (external author)
  •   Chen, Ming-Wei (external author)
  •   Xue, Qi-Kun (external author)
  •   Ma, Xu-Cun (external author)

Publication Date

  • 2014

Geographic Focus

Citation

  • Zhang, W., Sun, Y., Zhang, J., Li, F., Guo, M., Zhao, Y., Zhang, H., Peng, J., Xing, Y., Wang, H., Fujita, T., Hirata, A., Li, Z., Ding, H., Tang, C., Wang, M., Wang, Q., He, K., Ji, S., Chen, X., Wang, J., Xia, Z., Li, L., Wang, Y., Wang, J., Wang, L., Chen, M., Xue, Q. & Ma, X. (2014). Direct Observation of High-Temperature Superconductivity in One-Unit-Cell FeSe Films. Chinese Physics Letters, 31 (1), 017401-1-017401-5.

Scopus Eid

  • 2-s2.0-84892915502

Start Page

  • 017401-1

End Page

  • 017401-5

Volume

  • 31

Issue

  • 1

Place Of Publication

  • United Kingdom

Abstract

  • We prepared one-unit-cell (1-UC) thick FeSe films on insulating SrTiO3 substrates with non-superconducting FeTe

    protection layers by molecular beam epitaxy for ex situ studies. By direct transport and magnetic measurements,

    we provide definitive evidence for high temperature superconductivity in the 1-UC FeSe films with an onset ?C

    above 40 K and an extremely large critical current density ?C∼1.7×106 A/cm2

    at 2 K, which are much higher

    than ?C∼8 K and ?C∼104 A/cm2

    for bulk FeSe, respectively. Our work may pave the way to enhancing and

    tailoring superconductivity by interface engineering.

UOW Authors

  •   Zhang, Wenhao (external author)
  •   Sun, Yi (external author)
  •   Zhang, Jin (external author)
  •   Li, Fangsen (external author)
  •   Guo, Ming-Hua (external author)
  •   Zhao, Yanfei (external author)
  •   Zhang, Huimin (external author)
  •   Peng, Jun (external author)
  •   Xing, Ying (external author)
  •   Wang, Hui (external author)
  •   Fujita, Takeshi (external author)
  •   Hirata, Akihiko (external author)
  •   Li, Zhi (external author)
  •   Ding, Hao (external author)
  •   Tang, Chenjia (external author)
  •   Wang, Meng (external author)
  •   Wang, Qingyan (external author)
  •   He, Ke (external author)
  •   Ji, Shuaihua (external author)
  •   Chen, Xi (external author)
  •   Wang, Junfeng (external author)
  •   Xia, Zheng-Cai (external author)
  •   Li, Liang (external author)
  •   Wang, Ya-Yu (external author)
  •   Wang, Jian (external author)
  •   Wang, Lili (external author)
  •   Chen, Ming-Wei (external author)
  •   Xue, Qi-Kun (external author)
  •   Ma, Xu-Cun (external author)

Publication Date

  • 2014

Geographic Focus

Citation

  • Zhang, W., Sun, Y., Zhang, J., Li, F., Guo, M., Zhao, Y., Zhang, H., Peng, J., Xing, Y., Wang, H., Fujita, T., Hirata, A., Li, Z., Ding, H., Tang, C., Wang, M., Wang, Q., He, K., Ji, S., Chen, X., Wang, J., Xia, Z., Li, L., Wang, Y., Wang, J., Wang, L., Chen, M., Xue, Q. & Ma, X. (2014). Direct Observation of High-Temperature Superconductivity in One-Unit-Cell FeSe Films. Chinese Physics Letters, 31 (1), 017401-1-017401-5.

Scopus Eid

  • 2-s2.0-84892915502

Start Page

  • 017401-1

End Page

  • 017401-5

Volume

  • 31

Issue

  • 1

Place Of Publication

  • United Kingdom