Direct observation of high-temperature superconductivity in one-unit-cell FeSe films

Wen Hao Zhang, Yi Sun, Jin Song Zhang, Fang Sen Li, Ming Hua Guo, Yan Fei Zhao, Hui Min Zhang, Jun Ping Peng, Ying Xing, Hui Chao Wang, Takeshi Fujita, Akihiko Hirata, Zhi Li, Hao Ding, Chen Jia Tang, Meng Wang, Qing Yan Wang, Ke He, Shuai Hua Ji, Xi Chen & 9 others Jun Feng Wang, Zheng Cai Xia, Liang Li, Ya Yu Wang, Jian Wang, Li Li Wang, Ming Wei Chen, Qi Kun Xue, Xu Cun Ma

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158 Citations (Scopus)

Abstract

We prepared one-unit-cell (1-UC) thick FeSe films on insulating SrTiO 3 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 TC above 40 K and an extremely large critical current density JC∼1. 7×106 A/cm2 at 2 K, which are much higher than TC∼8 K and JC∼104 A/cm2 for bulk FeSe, respectively. Our work may pave the way to enhancing and tailoring superconductivity by interface engineering.

Original languageEnglish
Article number017401
JournalChinese Physics Letters
Volume31
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

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superconductivity
cells
thick films
magnetic measurement
critical current
molecular beam epitaxy
engineering
current density

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Zhang, W. H., Sun, Y., Zhang, J. S., Li, F. S., Guo, M. H., Zhao, Y. F., ... Ma, X. C. (2014). Direct observation of high-temperature superconductivity in one-unit-cell FeSe films. Chinese Physics Letters, 31(1), [017401]. https://doi.org/10.1088/0256-307X/31/1/017401

Direct observation of high-temperature superconductivity in one-unit-cell FeSe films. / Zhang, Wen Hao; Sun, Yi; Zhang, Jin Song; Li, Fang Sen; Guo, Ming Hua; Zhao, Yan Fei; Zhang, Hui Min; Peng, Jun Ping; Xing, Ying; Wang, Hui Chao; Fujita, Takeshi; Hirata, Akihiko; Li, Zhi; Ding, Hao; Tang, Chen Jia; Wang, Meng; Wang, Qing Yan; He, Ke; Ji, Shuai Hua; Chen, Xi; Wang, Jun Feng; Xia, Zheng Cai; Li, Liang; Wang, Ya Yu; Wang, Jian; Wang, Li Li; Chen, Ming Wei; Xue, Qi Kun; Ma, Xu Cun.

In: Chinese Physics Letters, Vol. 31, No. 1, 017401, 01.01.2014.

Research output: Contribution to journalArticle

Zhang, WH, Sun, Y, Zhang, JS, Li, FS, Guo, MH, Zhao, YF, Zhang, HM, Peng, JP, Xing, Y, Wang, HC, Fujita, T, Hirata, A, Li, Z, Ding, H, Tang, CJ, Wang, M, Wang, QY, He, K, Ji, SH, Chen, X, Wang, JF, Xia, ZC, Li, L, Wang, YY, Wang, J, Wang, LL, Chen, MW, Xue, QK & Ma, XC 2014, 'Direct observation of high-temperature superconductivity in one-unit-cell FeSe films', Chinese Physics Letters, vol. 31, no. 1, 017401. https://doi.org/10.1088/0256-307X/31/1/017401
Zhang, Wen Hao ; Sun, Yi ; Zhang, Jin Song ; Li, Fang Sen ; Guo, Ming Hua ; Zhao, Yan Fei ; Zhang, Hui Min ; Peng, Jun Ping ; Xing, Ying ; Wang, Hui Chao ; Fujita, Takeshi ; Hirata, Akihiko ; Li, Zhi ; Ding, Hao ; Tang, Chen Jia ; Wang, Meng ; Wang, Qing Yan ; He, Ke ; Ji, Shuai Hua ; Chen, Xi ; Wang, Jun Feng ; Xia, Zheng Cai ; Li, Liang ; Wang, Ya Yu ; Wang, Jian ; Wang, Li Li ; Chen, Ming Wei ; Xue, Qi Kun ; Ma, Xu Cun. / Direct observation of high-temperature superconductivity in one-unit-cell FeSe films. In: Chinese Physics Letters. 2014 ; Vol. 31, No. 1.
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AU - Zhang, Wen Hao

AU - Sun, Yi

AU - Zhang, Jin Song

AU - Li, Fang Sen

AU - Guo, Ming Hua

AU - Zhao, Yan Fei

AU - Zhang, Hui Min

AU - Peng, Jun Ping

AU - Xing, Ying

AU - Wang, Hui Chao

AU - Fujita, Takeshi

AU - Hirata, Akihiko

AU - Li, Zhi

AU - Ding, Hao

AU - Tang, Chen Jia

AU - Wang, Meng

AU - Wang, Qing Yan

AU - He, Ke

AU - Ji, Shuai Hua

AU - Chen, Xi

AU - Wang, Jun Feng

AU - Xia, Zheng Cai

AU - Li, Liang

AU - Wang, Ya Yu

AU - Wang, Jian

AU - Wang, Li Li

AU - Chen, Ming Wei

AU - Xue, Qi Kun

AU - Ma, Xu Cun

PY - 2014/1/1

Y1 - 2014/1/1

N2 - We prepared one-unit-cell (1-UC) thick FeSe films on insulating SrTiO 3 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 TC above 40 K and an extremely large critical current density JC∼1. 7×106 A/cm2 at 2 K, which are much higher than TC∼8 K and JC∼104 A/cm2 for bulk FeSe, respectively. Our work may pave the way to enhancing and tailoring superconductivity by interface engineering.

AB - We prepared one-unit-cell (1-UC) thick FeSe films on insulating SrTiO 3 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 TC above 40 K and an extremely large critical current density JC∼1. 7×106 A/cm2 at 2 K, which are much higher than TC∼8 K and JC∼104 A/cm2 for bulk FeSe, respectively. Our work may pave the way to enhancing and tailoring superconductivity by interface engineering.

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