Observation of mode-like features in tunneling spectra of iron-based superconductors

doi:10.1088/1674-1056/24/7/077402

Abstract

We report scanning tunneling microscopy/spectroscopy (STM/STS) studies on iron-based superconductors of Ba_1-xK_xFe₂As₂ and nearly optimally doped Fe(Te,Se). Mode-like features were observed universally outside the superconducting gaps in the tunneling spectra, which are similar to our previous observations in other samples and can be ascribed to the interaction between electrons and spin excitations. Furthermore, an almost linear relationship between the superconducting gaps and the superconducting transition temperatures was noted and should also be taken into account in understanding the mechanism of iron-based superconductors.

Keywords: superconductor scanning tunneling microscopy paring mechanism spin excitations

Received: 07 May 2015
Revised: 14 May 2015
Accepted manuscript online:

PACS:	74.55.+v	(Tunneling phenomena: single particle tunneling and STM)
	74.70.Xa	(Pnictides and chalcogenides)
	74.20.Mn	(Nonconventional mechanisms)

Fund:

Project supported by the National Basic Research Program of China (Grant Nos. 2011CBA00110 and 2012CB821403), the National Natural Science Foundation of China (Grant Nos. 11174349 and 11322432), and the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB07020300).

Corresponding Authors: Shan Lei
E-mail: lshan@iphy.ac.cn

Cite this article:

Gong Jing (巩靖), Hou Xing-Yuan (侯兴元), Zhu Jun (朱军), Jie Yun-Yin (揭云印), Gu Ya-Dong (谷亚东), Shen Bing (沈冰), Ren Cong (任聪), Li Chun-Hong (李春红), Shan Lei (单磊) Observation of mode-like features in tunneling spectra of iron-based superconductors 2015 Chin. Phys. B 24 077402

[1]	Kamihara Y, Watanabe T, Hirano M and Hosono H 2008 J. Am. Chem. Soc. 130 3296
[2]	Chen X H, Wu T, Wu G, Liu R H, Chen H and Fang D F 2008 Nature 453 761
[3]	Wen H H, Mu G, Fang L, Yang H and Zhu X Y 2008 Europhys. Lett. 82 17009
[4]	Chen G F, Li Z, Wu D, Li G, Hu W Z, Dong J, Zheng P, Luo J L and Wang N L 2008 Phys. Rev. Lett. 100 247002
[5]	Ren Z A, Lu W, Yang J, Yi W, Shen X L, Li Z C, Che G C, Dong X L, Sun L L, Zhou F and Zhao Z X 2008 Chin. Phys. Lett. 25 2215
[6]	Rotter M, Tegel M and Johrendt D 2008 Phys. Rev. Lett. 101 107006
[7]	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 and Xue Q K 2012 Chin. Phys. Lett. 29 037402
[8]	Lu D H, Yi M, Mo S K, Erickson A S, Analytis J, Chu J H, Singh D J, Hussain Z, Geballe T H, Fisher I R and Shen Z X 2008 Nature 455 81
[9]	Ren C, Wang Z S, Luo H Q, Yang H, Shan L and Wen H H 2008 Phys. Rev. Lett. 101 257006
[10]	Shan L, Wang Y L, Gong J, Shen B, Huang Y, Yang H, Ren C and Wen H H 2011 Phys. Rev. B 83 060510
[11]	Si Q Q and Abrahams E 2008 Phys. Rev. Lett. 101 076401
[12]	Si Q Q, Abrahams E, Dai J H and Zhu J X 2009 New J. Phys. 11 045001
[13]	Seo K, Bernevig B A and Hu J P 2008 Phys. Rev. Lett. 101 206404
[14]	Fang C, Wu Y L, Thomale R, Bernevig B A and Hu J P 2011 Phys. Rev. X 1 011009
[15]	Mazin I I, Singh D J, Johannes M D and Du M H 2008 Phys. Rev. Lett. 101 057003
[16]	Kuroki K, Onari S, Arita R, Usui H, Tanaka Y, Kontani H and Aoki H 2008 Phys. Rev. Lett. 101 087004
[17]	Dai P C, Hu J P and Dagotto E 2012 Nat. Phys. 8 709
[18]	Rowell J M, Anderson P W and Thomas D E 1963 Phys. Rev. Lett. 10 334
[19]	Schrieffer J R, Scalapino D J and Wilkins J W 1963 Phys. Rev. Lett. 10 336
[20]	McMillan W L and Rowell J M 1965 Phys. Rev. Lett. 14 108
[21]	Yu G, Li Y, Motoyama E M and Greven M 2009 Nat. Phys. 5 873
[22]	Song C L and Hoffman J E 2013 Current Opinion in Solid State and Materials Science 17 39
[23]	Brinckmann J and Lee P A 1999 Phys. Rev. Lett. 82 2915
[24]	Brinckmann J and Lee P A 2001 Phys. Rev. B 65 014502
[25]	Li T and Yang F 2010 Phys. Rev. B 81 214509
[26]	You Y Z, Yang F, Kou S P and Weng Z Y 2011 Phys. Rev. B 84 054527
[27]	Fasano Y, Maggio-Aprile I, Zhigadlo N D, Katrych S, Karpinski J and Fischer O 2010 Phys. Rev. Lett. 105 167005
[28]	Shan L, Gong J, Wang Y L, Shen B, Hou X Y, Ren C, Li C H, Yang H, Wen H H, Li S L and Dai P C 2012 Phys. Rev. Lett. 108 227002
[29]	Chi S, Grothe S, Liang R X, Dosanjh P, Hardy W N, Burke S A, Bonn D A and Pennec Y 2012 Phys. Rev. Lett. 109 087002
[30]	Wang Z Y, Yang H, Fang D L, Shen B, Wang Q H, Shan L, Zhang C L, Dai P C and Wen H H 2013 Nat. Phys. 9 42
[31]	Song C L, Wang Y L, Jiang Y P, Li Z, Wang L L, He K, Chen X, Hoffman J E, Ma X C and Xue Q K 2014 Phys. Rev. Lett. 112 057002
[32]	Allan M P, Lee K, Rost A W, Fischer M H, Massee F, Kihou K, Lee C H, Iyo A, Eisaki H, Chuang T M, Davis J C and Kim E A 2015 Nat. Phys. 11 177
[33]	Christianson A D, Goremychkin E A, Osborn R, Rosenkranz S, LumsdenMD, Malliakas C D, Todorov I S, Claus H, Chung D Y, KanatzidisMG, Bewley R I and Guidi T 2008 Nature 456 930
[34]	Christianson A D, Lumsden M D, Nagler S E, MacDougall G J, McGuire M A, Sefat A S, Jin R, Sales B C and Mandrus D 2009 Phys. Rev. Lett. 103 087002
[35]	Chi S X, Schneidewind A, Zhao J, Harriger L W, Li L J, Luo Y K, Cao G H, Xu Z A, Loewenhaupt M, Hu J P and Dai P C 2009 Phys. Rev. Lett. 102 107006
[36]	Lumsden M D, Christianson A D, Parshall D, Stone M B, Nagler S E, MacDougall G J, Mook H A, Lokshin K, Egami T, Abernathy D L, Goremychkin E A, Osborn R, McGuire M A, Sefat A S, Jin R, Sales B C and Mandrus D 2009 Phys. Rev. Lett. 102 107005
[37]	Qiu Y M, BaoW, Zhao Y, Broholm C, Stanev V, Tesanovic Z, Gasparovic Y C, Chang S, Hu J, Qian B, Fang M H and Mao Z Q 2009 Phys. Rev. Lett. 103 067008
[38]	Inosov D S, Park J T, Bourges P, Sun D L, Sidis Y, Schneidewind A, Hradil K, Haug D, Lin C T, Keimer B and Hinkov V 2010 Nat. Phys. 6 178
[39]	Mook H A, Lumsden M D, Christianson A D, Nagler S E, Sales B C, Jin R Y, McGuire M A, Sefat A S, Mandrus D, Egami T and Cruz C D 2010 Phys. Rev. Lett. 104 187002
[40]	Wakimoto S, Kodama K, Ishikado M, Matsuda M, Kajimoto R, Arai M, Kakurai K, Esaka F, Iyo A, Kito H, Eisaki H and Shamoto S 2010 J. Phys. Soc. Jpn. 79 074715
[41]	Taylor A E, Pitcher M J, Ewings R A, Perring T G, Clarke S J and Boothroyd A T 2011 Phys. Rev. B 83 220514
[42]	Babkevich P, Roessli B, Gvasaliya S N, Regnault L P, Freeman P G, Pomjakushina E, Conder K and Boothroyd A T 2011 Phys. Rev. B 83 180506
[43]	Zhang C L, Wang M, Luo H Q, Wang M Y, Liu M S, Zhao J, Abernathy D L, Maier T A, Marty K, Lumsden M D, Chi S X, Chang S, Rodriguez-Rivera J A, Lynn J W, Xiang T, Hu J P and Dai P C 2010 Sci. Rep. 1 115
[44]	Shan L, Wang Y L, Shen B, Zeng B, Huang Y, Li A, Wang D, Yang H, Ren C, Wang Q H, Pan S H and Wen H H 2011 Nat. Phys. 7 325
[45]	Yin J X, Wu Z, Wang J H, Ye Z Y, Gong J, Hou X Y, Shan L, Li A, Liang X J, Wu X X, Li J, Ting C S, Wang Z, Hu J P, Hor P H, Ding H and Pan S H 2015 to be published in Nat. Phys.
[46]	Zhang Y, Yang L X, Chen F, Zhou B, Wang X F, Chen X H, Arita M, Shimada K, Namatame H, Taniguchi M, Hu J P, Xie B P and Feng D L 2010 Phys. Rev. Lett. 105 117003
[47]	Nakayama K, Sato K, Richard P, Xu Y M, Kawahara T, Umezawa K, Qian T, Neupane M, Chen G F, Ding H and Takahashi T 2011 Phys. Rev. B 83 020501
[48]	Miao H, Richard P, Tanaka Y, Nakayama K, Qian T, Umezawa K, Sato T, Xu Y M, Shi Y B, Xu N, Wang X P, Zhang P, Yang H B, Xu Z J, Wen J S, Gu G D, Dai X, Hu J P, Takahashi T and Ding H 2012 Phys. Rev. B 85 094506
[49]	Hanaguri T, Niitaka S, Kuroki K and Takagi H 2010 Science 328 474
[50]	Zhou X D, Cai P, Wang A F, Ruan W, Ye C, Chen X H, You Y Z, Weng Z Y and Wang Y Y 2012 Phys. Rev. Lett. 109 037002
[51]	Yin Y, Zech M, Williams T L, Wang X F, Wu G, Chen X H and Hoffman J E 2009 Phys. Rev. Lett. 102 097002
[52]	Allan M P, Rost A W, Mackenzie A P, Xie Y, Davis J C, Kihou K, Lee C H, Iyo A, Eisaki H and Chuang T M 2012 Science 336 563
[53]	Hanaguri T, Kitagawa K, Matsubayashi K, Mazaki Y, Uwatoko Y and Takagi H 2012 Phys. Rev. B 85 214505
[54]	Hänke T, Sykora S, Schlegel R, Baumann D, Harnagea L, Wurmehl S, Daghofer M, Büchner B, Brink J and Hess C 2012 Phys. Rev. Lett. 108 127001
[55]	Song C L, Yin Y, Zech M, Williams T, Yee M M, Chen G F, Luo J L, Wang N L, Hudson E W and Hoffman J E 2013 Phys. Rev. B 87 214519
[56]	Chang K, Deng P, Zhang T, Lin H C, Zhao K, Ji S H, Wang L L, He K, Ma X C, Chen X and Xue Q K 2015 Europhys. Lett. 109 28003
[57]	Fan Q, Zhang W H, Liu X, Yan Y J, Ren M Q, Peng R, Xu H C, Xie B P, Hu J P, Zhang T and Feng D L 2015 arXiv 1504 02185
[58]	Pan S H 2013 APS March Meeting
[59]	Terashima K, Sekiba Y, Bowen J H, Nakayama K, Kawahara T, Sato T, Richard P, Xu M, Li L J, Cao G H, Xu Z A, Ding H and Takahashi T 2009 Proc. Natl. Acad. Sci. UAS 106 7330
[60]	Ding H, Richard P, Nakayama K, Sugawara K, Arakane T, Sekiba Y, Takayama A, Souma S, Sat T, Takahashi T, Wang Z, Dai X, Fang Z, Chen G F, Luo J L and Wang N L 2008 Europhys. Lett. 83 47001
[61]	Xu Y M, Richard P, Nakayama K, Kawahara T, Sekiba Y, Qian T, Neupane M, Souma S, Sato T, Takahashi T, Luo H Q, Wen H H, Chen G F, Wang N L, Wang Z, Fang Z, Dai X and Ding H 2011 Nat. Commun. 2 392
[62]	Liu Z H, Richard P, Nakayama K, Chen G F, Dong S, He J B, Wang D M, Xia T L, Umezawa K, Kawahara T, Souma S, Sato T, Takahashi T, Qian T, Huang Y B, Xu N, Shi Y B, Ding H and Wang S C 2011 Phys. Rev. B 84 064519
[63]	Umezawa K, Li Y, Miao H, Nakayama K, Liu Z H, Richard P, Sato T, He J B, Wang D M, Chen G F, Ding H, Takahashi T and Wang S C 2012 Phys. Rev. Lett. 108 037002
[64]	Ge Q Q, Ye Z R, Xu M, Zhang Y, Jiang J, Xie B P, Song Y, Zhang C L, Dai P C and Feng D L 2013 Phys. Rev. X 3 011020
[65]	Borisenko S V, Zabolotnyy V B, Evtushinsky D V, Kim T K, Morozov I V, Yaresko A N, Kordyuk A A, Behr G, Vasiliev A, Follath R and Büchner B 2010 Phys. Rev. Lett. 105 067002
[66]	Nakayama K, Sato T, Richard P, Kawahara T, Sekiba Y, Qian T, Chen G F, Luo J L, Wang N L, Ding H and Takahashi T 2010 Phys. Rev. Lett. 105 197001
[67]	Kawahara T, Terashima K, Sekiba Y, Bowen J H, Nakayama K, Sato T, Richard P, Xu Y M, Li L J, Cao G H, Xu Z A, Ding H and Takahashi T 2010 Physica C 470 S440
[68]	Xu Y M, Huang Y B, Cui X Y, Razzoli E, Radovic M, Shi M, Chen G F, Zheng P, Wang N L, Zhang C L, Dai P C, Hu J P, Wang Z and Ding H 2011 Nat. Phys. 7 198
[69]	Liu D F, Zhang W H, Mou D X, He J F, Ou Y B, Wang Q Y, Li Z, Wang L L, Zhao L, He S L, Peng Y Y, Liu X, Chen C Y, Yu L, Liu G D, Dong X L, Zhang J, Chen C T, Xu Z Y, Hu J P, Chen X, Ma X C, Xue Q K and Zhou X J 2012 Nat. Commun. 3 931
[70]	Balatsky A V and Zhu J X 2006 Phys. Rev. B 74 094517

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Observation of mode-like features in tunneling spectra of iron-based superconductors

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