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; 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

doi:10.1088/0256-307X/31/1/017401

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 ChenJun Feng Wang, Zheng Cai Xia, Liang Li, Ya Yu Wang, Jian Wang^*, Li Li Wang, Ming Wei Chen, Qi Kun Xue, Xu Cun Ma

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

248 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 T_C above 40 K and an extremely large critical current density J_C∼1. 7×10⁶ A/cm² at 2 K, which are much higher than T_C∼8 K and J_C∼10⁴ A/cm² for bulk FeSe, respectively. Our work may pave the way to enhancing and tailoring superconductivity by interface engineering.

Original language	English
Article number	017401
Journal	Chinese Physics Letters
Volume	31
Issue number	1
DOIs	https://doi.org/10.1088/0256-307X/31/1/017401
Publication status	Published - 2014 Jan
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1088/0256-307X/31/1/017401

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Zhang, W. H., Sun, Y., Zhang, J. S., Li, F. S., Guo, M. H., Zhao, Y. F., Zhang, H. M., Peng, J. P., Xing, Y., Wang, H. C., Fujita, T., Hirata, A., Li, Z., Ding, H., Tang, C. J., Wang, M., Wang, Q. Y., He, K., Ji, S. H., ... Ma, X. C. (2014). Direct observation of high-temperature superconductivity in one-unit-cell FeSe films. Chinese Physics Letters, 31(1), Article 017401. https://doi.org/10.1088/0256-307X/31/1/017401

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

@article{5395179e29f4496796f3341daf193207,

title = "Direct observation of high-temperature superconductivity in one-unit-cell FeSe films",

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.",

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

year = "2014",

month = jan,

doi = "10.1088/0256-307X/31/1/017401",

language = "English",

volume = "31",

journal = "Chinese Physics Letters",

issn = "0256-307X",

publisher = "IOP Publishing Ltd.",

number = "1",

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TY - JOUR

T1 - Direct observation of high-temperature superconductivity in one-unit-cell FeSe films

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

Y1 - 2014/1

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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AN - SCOPUS:84892915502

SN - 0256-307X

VL - 31

JO - Chinese Physics Letters

JF - Chinese Physics Letters

IS - 1

M1 - 017401

ER -

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

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