Chin. Phys. Lett.  2012, Vol. 29 Issue (3): 037402    DOI: 10.1088/0256-307X/29/3/037402
Interface-Induced High-Temperature Superconductivity in Single Unit-Cell FeSe Films on SrTiO3
WANG Qing-Yan1,2, LI Zhi2, ZHANG Wen-Hao1, ZHANG Zuo-Cheng1, ZHANG Jin-Song1, LI Wei1, DING Hao1, OU Yun-Bo2, DENG Peng1, CHANG Kai1, WEN Jing1, SONG Can-Li1, HE Ke2, JIA Jin-Feng1, JI Shuai-Hua1, WANG Ya-Yu1, WANG Li-Li2, CHEN Xi1, MA Xu-Cun2**, XUE Qi-Kun1**
1State Key Lab of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084
2Institute of Physics, Chinese Academy of Sciences, Beijing 100190
Download: PDF(869KB)  
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks

We report high transition temperature superconductivity in one unit-cell (UC) thick FeSe films grown on a Se-etched SrTiO3(001) substrate by molecular beam epitaxy (MBE). A superconducting gap as large as 20 meV and the magnetic field induced vortex state revealed by in situ scanning tunneling microscopy (STM) suggest that the superconductivity of the 1 UC FeSe films could occur around 77 K. The control transport measurement shows that the onset superconductivity temperature is well above 50 K. Our work not only demonstrates a powerful way for finding new superconductors and for raising TC, but also provides a well-defined platform for systematic studies of the mechanism of unconventional superconductivity by using different superconducting materials and substrates.

Keywords: 74.25.F-      74.55.+v      74.70.Xa     
Received: 01 February 2012      Published: 11 March 2012
PACS:  74.25.F- (Transport properties)  
  74.55.+v (Tunneling phenomena: single particle tunneling and STM)  
  74.70.Xa (Pnictides and chalcogenides)  
Cite this article:   
URL:       OR
E-mail this article
E-mail Alert
Articles by authors
[1] Bednorz J G and Müller K A 1986 Z. Phys. 64 189193

[2] Wu M K, Ashburn J R, Tomg C J, Hor P H, Meng R L, Gao L, Huang Z J, Wang Y Q and Chu C W 1987 Phys. Rev. Lett. 58 908

[3] Strongin M, Kammetrer O F, Crow J E, Parks R D, Douglass J and Jensen M A 1968 Phys. Rev. Lett. 21 1320

[4] Locquet J P et al 1998 Nature 394 453

[5] 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 and Wu M K 2008 Proc. Natl. Acad. Sci. U. S.A. 105 14262

[6] Kamihara Y, Watanabe T, Hirano M and Hosono H 2008 J. Am. Chem. Soc. 130 3296

[7] Song C L, Wang Y L, Cheng P, Jiang Y P, Li W, Zhang T, Li Z, He K, Wang L L, Jia J F, Huang H H, Wu C J, Ma X C, Chen X and Xue Q K 2011 Science 332 1410

[8] Song C L, Wang Y L, Jiang Y P, Li Z, Wang L L, He K, Chen X, Ma X C and Xue Q K 2011 Phys. Rev. B 84 020503

[9] Song Y J, Hong J B, Min B H, Lee K J, Jung M H, Rhyee J S and Kwon Y S 2011 J. Korean Phys. Soc. 59 312

[10] Medvedev S, Mcqueen T M, Troyan I A, Palasyuk T, Eremets M I, Cava R J, Naghavi S, Casper F, Ksenofontov V, Wortmann G and Felser C 2009 Nature Mater. 8 630

[11] Luh D A, Miller T, Paggel J J and Chiang T C 2002 Phys. Rev. Lett. 88 256802

[12] Zhang T et al 2010 Nature Phys. 6 104

[13] Uchihashi T, Mishra P, Aono M and Nakayama T 2011 Phys. Rev. Lett. 107 207001

[14] Reyren N et al 2007 Science 317 1196

[15] Guo J et al 2010 Phys. Rev. B 82 180520(R)

[16] Li W, Ding H, Deng P, Chang K, Song C L, He K, Wang L L, Ma X C, Hu J P, Chen X and Xue Q K 2012 Nature Phys. 8 126

[17] Bozovic I, Logvenov G, Verhoeven M A J, Caputo P, Goldobin E and Geballe T H 2003 Nature 422 873
Related articles from Frontiers Journals
[1] MA Long, ZHANG Jin-Shan, WANG Du-Ming, HE Jun-Bao, XIA Tian-Long, CHEN Gen-Fu, YU Wei-Qiang. NMR Study of Superconductivity and Spin Fluctuations in Hole-Doped Superconductor Ca1-xNaxFe2As2 (Tc=32 K)[J]. Chin. Phys. Lett., 2012, 29(6): 037402
[2] HU Shi-Jie,DU Wei,ZHANG Gui-Ping,GAO Miao,LU Zhong-Yi,WANG Xiao-Qun**. Exact Results for Intrinsic Electronic Transport in Graphene[J]. Chin. Phys. Lett., 2012, 29(5): 037402
Full text