In-situ measurement of diamagnetic response of potassium-adsorbed multi-layer FeSe ultrathin films on SrTiO3(001) substrate

Chen Chuan-Ting; Yao Gang; Duan Ming-Chao; Guan Dan-Dan; Li Yao-Yi; Zheng Hao; Wang Shi-Yong; Liu Can-Hua; Jia Jin-Feng

doi:10.7498/aps.67.20181522

Abstract

A single-unit-cell layer FeSe ultrathin film grown on SrTiO3(001) substrate exhibits remarkable high-temperature superconductivity, which has aroused intensive research interest. Electron transfer from the substrate to the FeSe layer has been shown to play an indispensable role in enhancing the extraordinary superconductivity. With this idea, researchers have tried to search for new high-temperature superconducting material systems including K-adsorbed multi-layer FeSe ultrathin films, on which superconducting-like energy gaps have been observed with scanning tunneling spectroscopy and photoelectron spectroscopy. However, the high-temperature superconductivity of the multi-layer FeSe ultrathin films has not yet been confirmed by directly observing the zero resistance or Meissner effect. With a self-developed multi-functional scanning tunneling microscope (STM+), which enables not only usual STM functionality, but also in situ two-coil mutual inductance measurement, we successfully observe the diamagnetic response of a K-adsorbed multilayer FeSe ultrathin film grown on a SrTiO3(001) substrate, and thus determine its transition temperature to be 23.9 K. Moreover, we calculate the penetration depth of the film from the measured results and find that its low-temperature behavior exhibits a quadratic variation, which strongly indicates that the order parameter of the superconducting K-adsorbed multi-layer FeSe ultrathin film has an S± pairing symmetry.

Keywords:

Authors and contacts

1.
Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
2.
Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China

Corresponding author: Liu Can-Hua, canhualiu@sjtu.edu.cn

Funds: Project supported by the National Basic Research Program of China (Grant Nos. 2016YFA0300403, 2016YFA0301003), the National Natural Science Foundation of China (Grant Nos. 11521404, 11574202, 11634009, 11655002, 11504230, U1632102), and the Funds of Shanghai Committee of Science and Technology, China (Grant Nos. 15JC1402300, 16DZ2260200).

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[23]	Zhang W H, Liu X, Wen C H, Peng R, Tan S Y, Xie B P, Zhang T, Feng D L 2016 Nano Lett. 16 1969
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[25]	Duan M C, Liu Z L, Ge J F, Tang Z J, Wang G Y, Wang Z X, Guan D, Li Y Y, Qian D, Liu C, Jia J F 2017 Rev. Sci. Instrum. 88 073902
[26]	Ge J F, Liu Z L, Gao C L, Qian D, Liu C, Jia J F 2015 Rev. Sci. Instrum 86 053903
[27]	Li Z, Peng J P, Zhang H M, Zhang W H, Ding H, Deng P, Chang K, Song C L, Ji S H, Wang L, He K, Chen X, Xue Q K, Ma X C 2014 J. Phys. Condens. Matter 26 265002
[28]	Hebard A F, Fiory A T 1980 Phys. Rev. Lett. 44 291
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[30]	Turneaure S J, Ulm E R, Lemberger T R 1996 J. Appl. Phys. 79 4221
[31]	Kogan V G, Prozorov R, Mishra V 2013 Phys. Rev. B 88 224508
[32]	Cho K, Kończykowski M, Teknowijoyo S, Tanatar M A, Liu Y, Lograsso T A, Straszheim W E, Mishra V, Maiti S, Hirschfeld P J, Prozorov R 2016 Sci. Adv. 2 e1600807
[33]	Cho K, Fente A, Teknowijoyo S, Tanatar M A, Joshi K R, Nusran N M, Kong T, Meier W R, Kaluarachchi U, Guillamón I, Suderow H, Bud’ko S L, Canfield P C, Prozorov R 2017 Phys. Rev. B 95 100502
[34]	Prozorov R, Kogan V G 2011 Rep. Prog. Phys. 74 124505
[35]	Du Z, Yang X, Altenfeld D, Gu Q, Yang H, Eremin I, Hirschfeld Peter J, Mazin I I, Lin H, Zhu X, Wen H H 2017 Nature Phys. 14 134

Cited By

[1]	Wang Q Y, Li Z, Zhang W H, Zhang Z C, Zhang J S, Li W, Ding H, Ou Y B, Deng P, Chang K, Wen J, Song C L, He K, Jia J F, Ji S H, Wang Y Y, Wang L L, Chen X, Ma X C, Xue Q K 2012 Chin. Phys. Lett. 29 037402
[2]	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, Chen X, Wang J F, Xia Z C, Li L, Wang Y Y, Wang J, Wang L L, Chen M W, Xue Q K, Ma X C 2014 Chin. Phys. Lett. 31 017401
[3]	Zhang Z, Wang Y H, Song Q, Liu C, Peng R, Moler K A, Feng D, Wang Y 2015 Sci. Bull. 60 1301
[4]	Sun Y, Zhang W, Xing Y, Li F, Zhao Y, Xia Z, Wang L, Ma X, Xue Q K, Wang J 2014 Sci. Rep. 4 6040
[5]	Ge J F, Liu Z L, Liu C, Gao C L, Qian D, Xue Q K, Liu Y, Jia J F 2015 Nature Mater. 14 285
[6]	Hsu F C, Luo J Y, Yeh K W, Chen T K, Huang T W, Wu P M, Lee Y C, Huang Y L, Chu Y Y, Yan D C, Wu M K 2008 Proc. Natl. Acad. Sci. U. S. A. 105 14262
[7]	Xiang Y Y, Wang F, Wang D, Wang Q H, Lee D H 2012 Phys. Rev. B 86 134508
[8]	Lee J J, Schmitt F T, Moore R G, Johnston S, Cui Y T, Li W, Yi M, Liu Z K, Hashimoto M, Zhang Y, Lu D H, Devereaux T P, Lee D H, Shen Z X 2014 Nature 515 245
[9]	Coh S, Cohen M L, Louie S G 2015 New J. Phys. 17 073027
[10]	Tian Y C, Zhang W H, Li F S, Wu Y L, Wu Q, Sun F, Zhou G Y, Wang L, Ma X, Xue Q K, Zhao J 2016 Phys. Rev. Lett. 116 107001
[11]	Tan S, Zhang Y, Xia M, Ye Z, Chen F, Xie X, Peng R, Xu D, Fan Q, Xu H, Jiang J, Zhang T, Lai X, Xiang T, Hu J, Xie B, Feng D 2013 Nature Mater. 12 634
[12]	Wang Q, Zhang W, Chen W, Xing Y, Sun Y, Wang Z, Mei J W, Wang Z, Wang L, Ma X C, Liu F, Xue Q K, Wang J 2017 2D Mater. 4 034004
[13]	Cao H Y, Tan S, Xiang H, Feng D L, Gong X G 2014 Phys. Rev. B 89 014501
[14]	Peng R, Shen X P, Xie X, Xu H C, Tan S Y, Xia M, Zhang T, Cao H Y, Gong X G, Hu J P, Xie B P, Feng D L 2014 Phys. Rev. Lett. 112 107001
[15]	Zhang W, Li Z, Li F, Zhang H, Peng J, Tang C, Wang Q, He K, Chen X, Wang L, Ma X, Xue Q K 2014 Phys. Rev. B 89 060506
[16]	He S, He J, Zhang W, Zhao L, Liu D, Liu X, Mou D, Ou Y B, Wang Q Y, Li Z, Wang L, Peng Y, Liu Y, Chen C, Yu L, Liu G, Dong X, Zhang J, Chen C, Xu Z, Chen X, Ma X, Xue Q, Zhou X J 2013 Nature Mater. 12 605
[17]	Bang J, Li Z, Sun Y Y, Samanta A, Zhang Y Y, Zhang W, Wang L, Chen X, Ma X, Xue Q K, Zhang S B 2013 Phys. Rev. B 87 220503
[18]	Miyata Y, Nakayama K, Sugawara K, Sato T, Takahashi T 2015 Nature Mater. 14 775
[19]	Tang C, Zhang D, Zang Y, Liu C, Zhou G, Li Z, Zheng C, Hu X, Song C, Ji S, He K, Chen X, Wang L, Ma X, Xue Q K 2015 Phys. Rev. B 92 180507
[20]	Wen C H, Xu H C, Chen C, Huang Z C, Lou X, Pu Y J, Song Q, Xie B P, Abdel Hafiez M, Chareev D A, Vasiliev A N, Peng R, Feng D L 2016 Nature Commun. 7 10840
[21]	Song C L, Zhang H M, Zhong Y, Hu X P, Ji S H, Wang L, He K, Ma X C, Xue Q K 2016 Phys. Rev. Lett. 116 157001
[22]	Tang C, Liu C, Zhou G, Li F, Ding H, Li Z, Zhang D, Li Z, Song C, Ji S, He K, Wang L, Ma X, Xue Q K 2016 Phys. Rev. B 93 020507
[23]	Zhang W H, Liu X, Wen C H, Peng R, Tan S Y, Xie B P, Zhang T, Feng D L 2016 Nano Lett. 16 1969
[24]	Zhang M L, Ge J F, Duan M C, Yao G, Liu Z L, Guan D D, Li Y Y, Qian D, Liu C H, Jia J F 2016 Acta Phys. Sin. 65 127401 (in Chinese) [张马淋, 葛剑峰, 段明超, 姚钢, 刘志龙, 管丹丹, 李耀义, 钱冬, 刘灿华, 贾金锋 2016 65 127401]
[25]	Duan M C, Liu Z L, Ge J F, Tang Z J, Wang G Y, Wang Z X, Guan D, Li Y Y, Qian D, Liu C, Jia J F 2017 Rev. Sci. Instrum. 88 073902
[26]	Ge J F, Liu Z L, Gao C L, Qian D, Liu C, Jia J F 2015 Rev. Sci. Instrum 86 053903
[27]	Li Z, Peng J P, Zhang H M, Zhang W H, Ding H, Deng P, Chang K, Song C L, Ji S H, Wang L, He K, Chen X, Xue Q K, Ma X C 2014 J. Phys. Condens. Matter 26 265002
[28]	Hebard A F, Fiory A T 1980 Phys. Rev. Lett. 44 291
[29]	Leemann C, Lerch P, Racine G, Martinoli P 1986 Phys. Rev. Lett. 56 1291
[30]	Turneaure S J, Ulm E R, Lemberger T R 1996 J. Appl. Phys. 79 4221
[31]	Kogan V G, Prozorov R, Mishra V 2013 Phys. Rev. B 88 224508
[32]	Cho K, Kończykowski M, Teknowijoyo S, Tanatar M A, Liu Y, Lograsso T A, Straszheim W E, Mishra V, Maiti S, Hirschfeld P J, Prozorov R 2016 Sci. Adv. 2 e1600807
[33]	Cho K, Fente A, Teknowijoyo S, Tanatar M A, Joshi K R, Nusran N M, Kong T, Meier W R, Kaluarachchi U, Guillamón I, Suderow H, Bud’ko S L, Canfield P C, Prozorov R 2017 Phys. Rev. B 95 100502
[34]	Prozorov R, Kogan V G 2011 Rep. Prog. Phys. 74 124505
[35]	Du Z, Yang X, Altenfeld D, Gu Q, Yang H, Eremin I, Hirschfeld Peter J, Mazin I I, Lin H, Zhu X, Wen H H 2017 Nature Phys. 14 134

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