Tunneling spectra for quantum wire/iron-based superconductor junction

Zhao Jing-Long; Dong Zheng-Chao; Zhong Chong-Gui; Li Cheng-Di

doi:10.7498/aps.64.057401

Abstract

Taking into account the interface scattering effect on each band (in-band interaction) and the interaction between the bands (inter-band interaction), within an extended Blonder-Tinkham-Klapwijk scattering formalism, we have studied the quasi-particle transport coefficients and the tunneling spectrum for quantum wire/iron-based superconductor junction of different types of two-level system by solving the Bogoliubov-de Gennes equations. It has been shown that: 1) When the junction is in ballistic limit, the platform near zero bias of the s -wave tunneling spectroscopy will become a conductance peak as the inter-band interaction increases, while a dip occurs in s++ -wave tunneling spectroscopy, and the zero-bias conductance peak will be depressed for p-wave. 2) When the interface scattering effect is not zero, the peaks in the two energy gaps of both s -wave and s++ -wave iron-based superconductor will be depressed; as the inter-band interaction increases, the dip between the two peaks will increase, moreover, the value of zero-bias conductance peaks for p-wave will be lowered and the value of nonzero-bias conductance will be increased. 3) As the in-band interaction is increased, the self-conductance peak will become sharper, while the another conductance peak is not only lowered but also smoothed. These results will be helpful for clarifying the structure of the pair-potential in iron-based superconductor and distinguishing their types.

Keywords:

Authors and contacts

1.
School of Sciences, Nantong University, Nantong 226019, China;
2.
School of Physical Sciences and Technology, Suzhou University, Suzhou 215006, China
Funds: Project supported by the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2012655).

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[40]	Herrera W J, Nino J V, Giraldo J J 2005 Phys. Rev. B 71 094515
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[43]	Bobkov A M, Bobkova I V 2010 JETP Lett. 91 415
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[45]	Blonder G E, Tinkham M, Klapwijk T M 1982 Phys. Rev. B 25 4515
[46]	De Gennes P G 1966 Superconductivity of Metals and Alloys (New York: Benjamin)

Cited By

[1]	Kuroki K, Onari S, Arita R, Usi H, Tanaka Y, Kontani H, Aoki H 2008 Phys. Rev. Lett. 101 087004
[2]	Kamihara Y, Watanabe T, Hirano M, Hosono H 2008 J. Am. Chem. Soc. 130 3296
[3]	Johnston D C 2010 Adv. Phys. 59 803
[4]	Ge Q Q, Ye Z R, Xu M, Zhang Y, Jiang J, Xie B P, Song Y, Jiang C L, Dai P C, Feng D L 2013 Phys. Rev. X 3 011020
[5]	Miao H, Richard P, Tanaka Y 2012 Phys. Rev. B 85 094506
[6]	Terashima K, Sekiba Y, Bowen J H 2009 Proceeding of the National Academy of Sciences 106 7330
[7]	Umezawa K, Li Y, Miao H 2012 Phys. Rev. Lett. 108 037002
[8]	Ding H 2008 Europhysics Letters. 83 47001
[9]	Shimojima T, Sakaguchi F, Ishizaka K, Isida Y, Kiss T, Okawa M, Togashi T, Chen C T, Watanabe S, Arita M, Shimada K, Namatame H, Taniguchi M, Ohgushi K, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Chainani A, Shin S 2011 Science 332 564
[10]	Fletcher J D, Serafin A, Malone L, Analytis J G, Chu J H, Erickson A S, Fisher I R, Carrington A 2009 Phys. Rev. Lett. 102 147001
[11]	Hicks C W, Lippman T M, Huber M E, Analytis J G, Chu J H, Erickson A S, Fisher I R, Moler K A 2009 Phys. Rev. Lett. 103 127003
[12]	Dong J K, Zhou S Y, Guan T Y, Zhang H, Dai Y F, Qiu X, Wang X F, He Y, Chen X H, Li S Y 2010 Phys. Rev. Lett. 104 087005
[13]	Hashimoto K, Yamashita M, Kasahara S, Senshu Y, Nakata N, Tonegawa S, Ikada K, Serafin A, Carrington A, Terashima T, Ikeda H, Shibauchi T, Matsuda Y 2010 Phys. Rev. B 81 220501
[14]	Yamashita M, Senshu Y, Shibauchi T, Kasahara S, Hashimoto K, Watanabe D, Ikeda H, Shibauchi T, Vekhter I, Vorontsov A B, Matsuda Y 2011 Phys. Rev. B 84 060507
[15]	Hashimoto K, Kasahara S, Katsumate R, Mizukami Y, Yamashita M, Ikeda H, Terashima T, Carrington A, Matsuda Y, Shibauchi T 2012 Phys. Rev. Lett. 108 047003
[16]	Zhang Y, Ye Z R, Ge Q Q, Chen F, Jiang J, Xu M, Xie B P, Feng D L 2012 Nature Physics 8 371
[17]	Seo K, Berneving B A, Hu J 2008 Phys. Rev. Lett. 101 206404
[18]	Mazin I I, Singh D J, Johannes M D, Du MH 2008 Phys. Rev. Lett. 101 057003
[19]	Wang F, Zhai H, Ran Y, Vishwanath A, Lee D H 2009 Phys. Rev. Lett. 102 047005
[20]	Cvetkovic V, Tesanovic Z 2009 Europhys. Lett. 85 37002
[21]	Kontani H, Onari S 2010 Phys. Rev. Lett. 104 157001
[22]	Onari S, Kontani H 2009 Phys. Rev. Lett. 103 177001
[23]	Saito T, Onair S, Kontani H 2010 Phys. Rev. B 82 144510
[24]	Patrick A L, Wen X G 2008 Phys. Rev. B 78 144517
[25]	Sperstad I B, Linder J, Sudbo A 2009 Phys. Rev. B 80 144507
[26]	Nagai Y, Hayashi N 2009 Phys. Rev. B 79 224508
[27]	Onari S, Tanaka Y 2009 Phys. Rev. B 79 174526
[28]	Linder J, Sudbo A 2009 Phys. Rev. B 79 020501
[29]	Golubov A A, Brinkman A, Tanaka Y, Mazin I I, Dolgov O V 2009 Phys. Rev. Lett. 103 077003
[30]	Burmistrova A V, Devyatov I A 2012 JETP Lett. 95 239
[31]	Feng X Y, Ng T K 2009 Phys. Rev. B 79 184503
[32]	Tsai W F, Yao D X, Andrei Bernevig B, Hu J P 2009 Phys. Rev. B 80 012511
[33]	Paglione J, Greene R L 2010 Nat. Phys. 6 645
[34]	Hirschfeld P J, Korshunov M M, Mazin I I 2011 Rep. Prog. Phys. 74 124508
[35]	Keles A, Andreev A V, Spivak B Z 2014 Phys. Rev. B 89 014505
[36]	Jin X, Dong Z C, Liang Z P, Zhong C G 2013 Acta Phys. Sin. 62 047401 (in Chinese) [金霞, 董正超, 梁志鹏, 仲崇贵 2013 62 047401]
[37]	Dong Z C 1999 Acta Phys. Sin. 48 2357 (in Chinese) [董正超 1999 48 2357]
[38]	Wei J W 2009 Chinese Physics B 18 1674
[39]	Li X W 2007 Acta Phys. Sin. 56 6033 (in Chinese) [李晓薇 2007 56 6033]
[40]	Herrera W J, Nino J V, Giraldo J J 2005 Phys. Rev. B 71 094515
[41]	Takagaki Y, Ploog K H 1999 Phys. Rev. B 60 9750
[42]	Ghaemi P, Wang F, Vishwanath A 2009 Phys. Rev. Lett. 102 157002
[43]	Bobkov A M, Bobkova I V 2010 JETP Lett. 91 415
[44]	Bobkov A M, Bobkova I V 2011 Phys. Rev. B 84 134527
[45]	Blonder G E, Tinkham M, Klapwijk T M 1982 Phys. Rev. B 25 4515
[46]	De Gennes P G 1966 Superconductivity of Metals and Alloys (New York: Benjamin)

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Vol. 64, Issue 5 - 2015-03-05

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