Abstract
We propose a phenomenological single-band model for the newly discovered iron-selenide superconductors A x Fe2−y Se2 (A = Tl, K, Rb, Cs). Based on this minimum model and the random phase approximation, the d x² − y² pairing symmetry is revealed theoretically, which may be understood in the framework of Fermi surface topology. A common origin of superconductivity is elucidated for this compound and other high-T c materials. The spin excitations at (π,π/2) in superconducting states are observed, in good agreement with the neutron scattering experiments. The spin resonance is indicated to show up only for the d-wave pairing, which provides an additional indication for the d-wave pairing symmetry in this family of superconductors.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
J.G. Guo, S.F. Jin, G. Wang, S.C. Wang, K.X. Zhu, T.T. Zhou, M. He, X.L. Chen, Phys. Rev. B 82, R180520 (2010)
A. Krzton-Maziopa, Z. Shermadini, E. Pomjakushina, V. Pomjakushin, M. Bendele, A. Amato, R. Khasanov, H. Luetkens, K. Conder, J. Phys.: Condens. Matter 23, 052203 (2011)
M.H. Fang, H.D. Wang, C.H. Dong, Z.J. Li, C.M. Feng, J. Chen, H.Q. Yuan, Europhys. Lett. 94, 27009 (2011)
Y. Zhang, L.X. Yang, M. Xu, Z.R. Ye, F. Chen., C. He, H.C. Xu, J. Jiang, B.P. Xie, J.J. Ying, X.F. Wang, X.H. Chen, J.P. Hu, M. Matsunami, S. Kimura, D.L. Feng, Nature Mater. 10, 273 (2011)
Daixiang Mou, Shanyu Liu, Xiaowen Jia, Junfeng He, Yingying Peng, Lin Zhao, Li Yu, Guodong Liu, Shaolong He, Xiaoli Dong, Jun Zhang, Hangdong Wang, Chiheng Dong, Minghu Fang, Xiaoyang Wang, Qinjun Peng, Zhimin Wang, Shenjin Zhang, Feng Yang, Zuyan Xu, Chuangtian Chen, X.J. Zhou, Phys. Rev. Lett. 106, 107001 (2011)
Lin Zhao, Daixiang Mou, Shanyu Liu, Xiaowen Jia, Junfeng He, Yingying Peng, Li Yu, Xu Liu, Guodong Liu, Shaolong He, Xiaoli Dong, Jun Zhang, J.B. He, D.M. Wang, G.F. Chen, J.G. Guo, X.L. Chen, Xiaoyang Wang, Qinjun Peng, Zhimin Wang, Shenjin Zhang, Feng Yang, Zuyan Xu, Chuangtian Chen, X.J. Zhou, Phys. Rev. B 83, 140508(R) (2011)
X. Wang, T. Qian, P. Richard, P. Zhang, J. Dong, H. Wang, C. Dong, M. Fang, H. Ding, Europhys. Lett. 93, 57001 (2011)
T. Qian, X.-P. Wang, W.-C. Jin, P. Zhang, P. Richard, G. Xu, X. Dai, Z. Fang, J.-G. Guo, X.-L. Chen, H. Ding, Phys. Rev. Lett. 106, 187001 (2011)
M. Xu, Q.Q. Ge, R. Peng, Z.R. Ye, Juan Jiang, F. Chen, X.P. Shen, B.P. Xie, Y. Zhang, D.L. Feng, Angle-resolved photoemission evidence of s-wave superconducting gap in KxFe2−ySe2 superconductor, arXiv:1205.0787
X.-P. Wang, P. Richard, A. van Roekeghem, Y.-B. Huang, E. Razzoli, T. Qian, H.-D. Wang, C.-H. Dong, M.-H. Fang, M. Shi, H. Ding, Observation of an isotropic superconducting gap at the Brillouin zone center of Tl0.63K0.37Fe1.78Se2, arXiv:1205.0996
I.R. Shein, A.L. Ivanovskii, Phys. Lett. A 375, 1028 (2011)
Xun-Wang Yan, Miao Gao, Zhong-Yi Lu, Tao Xiang, Phys. Rev. B 84, 054502 (2011)
Chao Cao, Jianhui Dai, Chin. Phys. Lett. 28, 057402 (2011)
I.I. Mazin, D.J. Singh, M.D. Johannes, M.H. Du, Phys. Rev. Lett. 101, 057003 (2008)
Z.-J. Yao, J.X. Li, Z.D. Wang, New J. Phys. 11, 025009 (2009)
Fa Wang, Fan Yang, Miao Gao, Zhong-Yi Lu, Tao Xiang, Dung-Hai Lee, Europhys. Lett. 93, 57003 (2011)
T.A. Maier, S. Graser, P.J. Hirschfeld, D.J. Scalapino, Phys. Rev. B 83, 100515(R) (2011)
T. Das, A.V. Balatsky, Phys. Rev. B 84, 014521 (2011)
H. Kotegawa, Y. Hara, H. Nohara, H. Tou, Y. Mizuguchi, H. Takeya, Y. Takano, J. Phys. Soc. Jpn 80, 043708 (2011)
Chen Fang, Yang-Le Wu, R. Thomale, B.A. Bernevig, Jiangping Hu, Phys. Rev. X 1, 011009 (2011)
I.I. Mazin, Phys. Rev. B 84, 024529 (2011)
T. Saito, S. Onari, H. Kontani, Phys. Rev. B 83, 140512(R) (2011)
Yi Zhou, Dong-Hui Xu, Fu-Chun Zhang, Wei-Qiang Chen, Europhys. Lett. 95, 17003 (2011)
Rong Yu, Pallab Goswami, Qimiao Si, P. Nikolic, Jian-Xin Zhu, Pairing strength and symmetries of (K, Tl)FexSe2 in comparison with iron pnictides, arXiv:1103.3259
W. Bao, Q.Z. Huang, G.F. Chen, M.A. Green, Du-Ming Wang, Jun-Bao He, Yi-Ming Qiu, Chin. Phys. Lett. 28, 086104 (2011)
Miaoyin Wang, Chen Fang, Dao-Xin Yao, GuoTai Tan, L.W. Harriger, Yu Song, T. Netherton, Chenglin Zhang, Meng Wang, M.B. Stone, Wei Tian, Jiangping Hu, Pengcheng Dai, Nature Commun. 2, 580 (2011)
J.T. Park, G. Friemel, Yuan Li, J.-H. Kim, V. Tsurkan, J. Deisenhofer, H.-A. Krug von Nidda, A. Loidl, A. Ivanov, B. Keimer, D.S. Inosov, Phys. Rev. Lett. 107, 177005 (2011)
G. Friemel, J.T. Park, T.A. Maier, V. Tsurkan, Yuan Li, J. Deisenhofer, H.-A. Krug von Nidda, A. Loidl, A. Ivanov, B. Keimer, D.S. Inosov, Phys. Rev. B 85, 140511(R) (2012)
Miaoyin Wang, Chunhong Li, D.L. Abernathy, Yu Song, S.V. Carr, Xingye Lu, Shiliang Li, Jiangping Hu, Tao Xiang, Pengcheng Dai, (π,0) antiferromagnetic spin excitations in superconducting Rb0.82Fe1.68Se2, arXiv:1201.3348
F. Chen, M. Xu, Q.Q. Ge, Y. Zhang, Z.R. Ye, L.X. Yang, Juan Jiang, B.P. Xie, R.C. Che, M. Zhang, A.F. Wang, X.H. Chen, D.W. Shen, J.P. Hu, D.L. Feng, Phys. Rev. X 1, 021020 (2011)
A. Ricci, N. Poccia, G. Campi, B. Joseph, G. Arrighetti, L. Barba, M. Reynolds, M. Burghammer, H. Takeya, Y. Mizuguchi, Y. Takano, M. Colapietro, N.L. Saini, A. Bianconi, Phys. Rev. B 84, 060511 (2011)
Z. Wang, Y.J. Song, H.L. Shi, Z.W. Wang, Z. Chen, H.F. Tian, G.F. Chen, J.G. Guo, H.X. Yang, J.Q. Li, Phys. Rev. B 83, 140505(R) (2011)
B. Shen, B. Zeng, G.F. Chen, J.B. He, D.M. Wang, H. Yang, H.H. Wen, Europhys. Lett. 96, 37010 (2011)
Wei Li, Hao Ding, Peng Deng, Kai Chang, Canli Song, Ke He, Lili Wang, Xucun Ma, Jiang-Ping Hu, Xi Chen, Qi-Kun Xue, Nature Phys., doi:10.1038/nphys2155 (2011)
K. Kuroki, S. Onari, R. Arita, H. Usui, Y. Tanaka, H. Kontani, H. Aoki, Phys. Rev. Lett. 101, 087004 (2008)
Q. Han, Y. Chen, Z.D. Wang, Europhys. Lett. 82, 37007 (2008)
S. Raghu, Xiao-Liang Qi, Chao-Xing Liu, D.J. Scalapino, Shou-Cheng Zhang, Phys. Rev. B 77, 220503(R) (2008)
Rong Yu, Jian-Xin Zhu, Qimiao Si, Phys. Rev. Lett. 106, 186401 (2011)
Jian-Xin Zhu, Rong Yu, A.V. Balatsky, Qimiao Si, Phys. Rev. Lett. 107, 167002 (2011)
K. Kuroki, Y. Tanaka, R. Arita, Phys. Rev. B 71, 024506 (2005)
X.S. Ye, J.X. Li, Phys. Rev. B 76, 174503 (2007)
J. Brinckmann, P.A. Lee, Phys. Rev. Lett. 82, 2915 (1999)
Tao Zhou, Z.D. Wang, Phys. Rev. B 76, 094510 (2007)
Author information
Authors and Affiliations
Corresponding author
Additional information
This article is published with open access at Springerlink.com
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
About this article
Cite this article
Zhou, T., Wang, Z.D. A minimum single-band model for low-energy excitations in superconducting A x Fe2−y Se2 . Eur. Phys. J. B 85, 224 (2012). https://doi.org/10.1140/epjb/e2012-30315-8
Received:
Revised:
Published:
DOI: https://doi.org/10.1140/epjb/e2012-30315-8