Effect of high pressure on intercalated FeSe high-Tc superconductors

Sun Jian-Ping; Prashant Shahi; Zhou Hua-Xue; Ni Shun-Li; Wang Shao-Hua; Lei He-Chang; Wang Bo-Sen; Dong Xiao-Li; Zhao Zhong-Xian; Cheng Jin-Guang

doi:10.7498/aps.67.20181319

Abstract

Among the iron-based superconductors, the structural simplest FeSe and its derived materials have received much attention in recent years due to the great tunability of the superconducting transition temperature (Tc). The relatively low Tc 8.5 K of FeSe can be raised to over 40 K via the interlayer intercalations such as AxFe2-ySe2 (A=K, Rb, Cs, Tl), Lix(NH3)yFe2Se2, and (Li1-xFex)OHFeSe. Although the monolayer FeSe/SrTiO3 is reported to have a Tc as high as 65 K, none of the Tc values of these FeSe-derived bulk materials has exceeded 50 K at ambient pressure so far. In order to explore other routes to further enhance Tc of FeSe-based materials, we recently performed the detailed high-pressure study of two intercalated FeSe high-Tc superconductors, namely (Li0.84Fe0.16)OHFe0.98Se and Li036(NH3)yFe2Se2, by using a cubic anvil cell apparatus. We find that the applied high pressure first suppresses the superconducting phase (denoted as SC-I) and then induces a second high-Tc superconducting phase (denoted as SC-Ⅱ) above a critical pressure Pc (~5 GPa for (Li0.84Fe0.16)OHFe0.98Se and 2 GPa for Li036(NH3)yFe2Se2). The highest Tc values in the SC-Ⅱ phases of these two compounds can reach~52 K and 55 K, respectively, the latter of which is the highest in the FeSe-based bulk materials, and is very close to the highest Tc of FeAs-based high-Tc superconductors. Our high-precision resistivity data of (Li0.84Fe0.16)OHFe0.98Se also uncover a sharp transition of the normal state from Fermi liquid for SC-I to non-Fermi liquid for SC-Ⅱ phase. In addition, the reemergence of high-Tc SC-Ⅱ phase under pressure is found to be accompanied with a concurrent enhancement of electron carrier density. Interestingly, we find a nearly parallel scaling behavior between Tc and the inverse Hall coefficient for the SC-Ⅱ phases of both (Li0.84Fe0.16)OHFe0.98Se and Li0.36(NH3)yFe2Se2. In the case without structural transition below 10 GPa, the observed enhancement of carrier density in SC-Ⅱ should be ascribed to an electronic origin presumably associated with pressure-induced Fermi surface reconstruction. Our work demonstrates that high pressure offers a distinctive means to further raise the maximum Tc values of intercalated FeSe-based materials.

Keywords:

Authors and contacts

1.
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2.
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3.
Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China

Corresponding author: Cheng Jin-Guang, jgcheng@iphy.ac.cn

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 11574377), the National Key R D Program of China (Grant Nos. 2018YFA0305700, 2018YFA0305800), and the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (Grant Nos. QYZDB-SSW-SLH013, QYZDB-SSW-SLH001).

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[33]	Shahi P, Sun J P, Wang S H, Jiao Y Y, Chen K Y, Sun S S, Lei H C, Uwatoko Y, Wang B S, Cheng J G 2017 Phys. Rev. B 97 020508
[34]	Cheng J G, Wang B S, Sun J P, Uwatoko Y 2018 Chin. Phys. B 27 077403
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Cited By

[1]	Kamihara Y, Watanabe T, Hirano M, Hosono H 2008 J. Am. Chem. Soc. 130 3296
[2]	Chen X, Dai P, Feng D, Xiang T, Zhang F C 2014 Natl. Sci. Rev. 1 371
[3]	Si Q, Yu R, Abraham E 2016 Nat. Rev. Mater. 1 16017
[4]	Ren Z, Lu W, Yang J, Yi W, Shen X, Li Z, Che G, Dong X, Sun L, Zhou F, Zhao Z 2008 Chin. Phys. Lett. 25 2215
[5]	Mazin I I, Singh D J, Johannes M D, Du M H 2008 Phys. Rev. Lett. 101 057003
[6]	Bohmer A E, Kreisel A 2018 J. Phys.: Condens. Matter 30 023001
[7]	McQueen T M, Williams A J, Stephens P W, Tao J, Zhu Y, Ksenofontov V, Casper F, Felser C, Cava R J 2009 Phys. Rev. Lett. 103 057002
[8]	Shimojima T, Suzuki Y, Snonbe T, Nakamura A, Sakano M, Omachi J, Yoshioka K, Kuwata-Gonokami M, Ono K, Kumigashira H, Bohmer A E, Hardy F, Wolf T, Meingast C, Lohneysen H v, Ikeda H, Ishizaka K 2014 Phys. Rev. B 90 121111
[9]	Nakayama K, Miyata Y, Phan G N, Sato T, Tanabe Y, Urata T, Tanigaki K, Takahashi T 2014 Phys. Rev. Lett. 113 237001
[10]	Fernandes R M, Chubukov A V, Schmalian J 2014 Nat. Phys. 10 97
[11]	Glasbrenner J K, Mazin I I, Jeschke H O, Hirschfeld P J, Fernandes R M, Valenti R 2015 Nat. Phys. 11 953
[12]	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 PNAS 105 14262
[13]	Kasahara S, Watashige T, Hanaguri T, Kohsaka Y, Yamashita T, Shimoyama Y, Mizukami Y, Endo R, Ikeda H, Aoyama K, Terashima T, Uji S, Wolf T, Lohneysen H v, Shibauchi T, Matsuda Y 2014 PNAS 111 16309
[14]	Guo J G, Jin S F, Wang G, Wang S C, Zhu K X, Zhou T T, He M, Chen X L 2010 Phys. Rev. B 82 180520
[15]	Scheidt E W, Hathwar V R, Schmitz D, Dunbar A, Scherer W, Mayr F, Tsurkan V, Deisenhofer J, Loidl A 2012 Eur. Phys. J. B 85 279
[16]	Lu X F, Wang N Z, Wu H, Wu Y P, Zhao D, Zeng X Z, Lou X G, Wu T, Bao W, Zhang G H, Huang F Q, Huang Q Z, Chen X H 2014 Nat. Mater. 14 325
[17]	Lei B, Cui J H, Xiang Z J, Shang C, Wang N Z, Ye G J, Luo X G, Wu T, Sun Z, Chen X H 2016 Phys. Rev. Lett. 116 077002
[18]	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
[19]	He S, He J, Zhang W, Zhao L, Liu D, Liu X, Mou D, Ouyang B, Wang Q, 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 Nat. Mater. 12 605
[20]	Ge J F, Liu Z L, Liu C, Gao C L, Qian D, Xue Q K, Liu Y, Jia J F 2015 Nat. Mater. 14 285
[21]	Zhao L, Liang A, Yuan D, Hu Y, Liu D, Huang J, He S, Shen B, Xu Y, Liu X, Yu L, Liu G, Zhou H, Huang Y, Dong X, Zhou F, Liu K, Lu Z, Zhao Z, Chen C, Xu Z, Zhou X J 2016 Nat. Commun. 7 10608
[22]	Lei B, Xiang Z J, Lu X F, Wang N Z, Chang J R, Shang C, Zhang A M, Zhang Q M, Luo X G, Wu T, Sun Z, Chen X H 2016 Phys. Rev. B 93 060501
[23]	Ren M Q, Yan Y J, Niu X H, Tao R, Hu D, Peng R, Xie B P, Zhao J, Zhang T, Feng D L 2017 Sci. Adv. 3 e1603238
[24]	Sun L L, Chen X J, Guo J, Gao P W, Huang Q Z, Wang H D, Fang M H, Chen X L, Chen G F, Wu Q, Zhang C, Gu D C, Dong X L, Wang L, Yang K, Li A G, Dai X, Mao H K, Zhao Z X 2012 Nature 483 67
[25]	Wang C H, Chen T K, Chang C C, Hsu C H, Lee Y C, Wang M J, Wu P M, Wu M K 2015 EPL 111 27004
[26]	Ye F, Bao W, Chi S, dos Santos A M, Molaison J J, Fang M H, Wang H D, Mao Q H, Wang J C, Liu J J, Sheng J M 2014 Chin. Phys. Lett. 31 127401
[27]	Fujita H, Kagayama T, Shimizu K, Yamamoto Y, Mizuki J I, Okazaki H, Takano Y 2015 J. Phys.: Conf. Ser. 592 012070
[28]	Izumi M, Zheng L, Sakai Y, Goto H, Sakata M, Nakamoto Y, Nguyen H L, Kagayama T, Shimizu K, Araki S, Kobayashi T C, Kambe T, Gu D, Guo J, Liu J, Li Y, Sun L, Prassides K, Kubozono Y 2015 Sci. Rep. 5 9477
[29]	Dong X L, Jin K, Yuan D N, Zhou H X, Yuan J, Huang Y L, Hua W, Sun J L, Zheng P, Hu W, Mao Y Y, Ma M W, Zhang G M, Zhou F, Zhao Z X 2015 Phys. Rev. B 92 064515
[30]	Sun S S, Wang S H, Yu R, Lei H C 2017 Phys. Rev. B 96 064512
[31]	Cheng J G 2017 Acta Phys. Sin. 66 037401 (in Chinese)[程金光 2017 66 037401]
[32]	Sun J P, Shahi P, Zhou H X, Huang Y L, Chen K Y, Wang B S, Ni S L, Li N N, Zhang K, Yang W G, Uwatoko Y, Xing G, Sun J, Singh D J, Jin K, Zhou F, Zhang G M, Dong X L, Zhao Z X, Cheng J G 2018 Nat. Commun. 9 380
[33]	Shahi P, Sun J P, Wang S H, Jiao Y Y, Chen K Y, Sun S S, Lei H C, Uwatoko Y, Wang B S, Cheng J G 2017 Phys. Rev. B 97 020508
[34]	Cheng J G, Wang B S, Sun J P, Uwatoko Y 2018 Chin. Phys. B 27 077403
[35]	Dong X, Zhou H, Yang H, Yuan J, Jin K, Zhou F, Yuan D, Wei L, Li J, Wang X, Zhang G, Zhao Z 2015 J. Am. Chem. Soc. 137 66
[36]	Jin K, Butch N P, Kirshenbaum K, Paglione J, Greene R L 2011 Nature 476 73
[37]	Kasahara S, Shibauchi T, Hashimoto K, Ikada K, Tonegawa S, Okazaki R, Shishido H, Ikeda H, Takeya H, Kirata K, Terashima T, Matsuda Y 2010 Phys. Rev. B 81 184519
[38]	Sun J P, Matsuura K, Ye G Z, Mizukami Y, Shimozawa M, Matsubayashi K, Yamashita M, Watashige T, Kasahara S, Matsuda Y, Yan J Q, Sales B C, Uwatoko Y, Cheng J G, Shibauchi T 2016 Nat. Comm. 7 12146
[39]	Phan G N, Nakayama K, Sugawara K, Sato T, Urato T, Tanabe Y, Tanigaki K, Nabeshima F, Imai Y, Maeda A, Takahashi T 2017 Phys. Rev. B 95 224507
[40]	Iimura S, Matsuishi S, Sato H, Hanna T, Muraba Y, Kim S W, Kim J E, Takata M, Hosono H 2012 Nat. Commun. 3 943
[41]	Yang J, Zhou R, Wei L L, Yang H X, Li J Q, Zhao Z X, Zheng G Q 2015 Chin. Phys. Lett. 32 107401
[42]	Das T, Panagopoulos C 2016 New J. Phys. 18 103033
[43]	Yuan H Q, Grosche F M, Deppe M, Geibel C, Sparn G, Steglich F 2003 Science 302 2104
[44]	Das T, Balatsky A V 2013 New J. Phys. 15 093045

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