Evidence for an s-wave superconducting gap in KxFe2-ySe2 from angle-resolved photoemission

被引：68
作者：
Xu, M. [1 ,2 ]
Ge, Q. Q. [1 ,2 ]
Peng, R. [1 ,2 ]
Ye, Z. R. [1 ,2 ]
Jiang, Juan [1 ,2 ]
Chen, F. [1 ,2 ]
Shen, X. P. [1 ,2 ]
Xie, B. P. [1 ,2 ]
Zhang, Y. [1 ,2 ]
Wang, A. F. [3 ,4 ]
Wang, X. F. [3 ,4 ]
Chen, X. H. [3 ,4 ]
Feng, D. L. [1 ,2 ]
机构：
[1] Fudan Univ, State Key Lab Surface Phys, Dept Phys, Shanghai 200433, Peoples R China
[2] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China
[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
[4] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China
来源：
PHYSICAL REVIEW B | 2012年 / 85卷 / 22期
基金：
美国国家科学基金会;
关键词：
FERMI-SURFACE;
D O I：
10.1103/PhysRevB.85.220504
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Although a nodeless superconducting gap has been observed on the large Fermi pockets around the zone corner in KxFe2-ySe2, whether its pairing symmetry is s wave or nodeless d wave is still under intense debate. Here we report an isotropic superconducting gap distribution on the small electron Fermi pocket around the Z point in KxFe2-ySe2, which favors the s-wave pairing symmetry.
引用
收藏
页数：5
相关论文
共 42 条
  • [1] [Anonymous], unpublished
  • [2] A Novel Large Moment Antiferromagnetic Order in K0.8Fe16Se2 Superconductor
    Bao Wei
    Huang Qing-Zhen
    Chen Gen-Fu
    Green, M. A.
    Wang Du-Ming
    He Jun-Bao
    Qiu Yi-Ming
    [J]. CHINESE PHYSICS LETTERS, 2011, 28 (08)
  • [3] Buchner B., ARXIV12042432
  • [4] Charnukha A., ARXIV12025446
  • [5] Electronic Identification of the Parental Phases and Mesoscopic Phase Separation of KxFe2-ySe2 Superconductors
    Chen, F.
    Xu, M.
    Ge, Q. Q.
    Zhang, Y.
    Ye, Z. R.
    Yang, L. X.
    Jiang, Juan
    Xie, B. P.
    Che, R. C.
    Zhang, M.
    Wang, A. F.
    Chen, X. H.
    Shen, D. W.
    Hu, J. P.
    Feng, D. L.
    [J]. PHYSICAL REVIEW X, 2011, 1 (02): : 1 - 8
  • [6] Stripes, spin resonance, and nodeless d-wave pairing symmetry in Fe2Se2-based layered superconductors
    Das, Tanmoy
    Balatsky, A. V.
    [J]. PHYSICAL REVIEW B, 2011, 84 (01):
  • [7] Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
    Ding, H.
    Richard, P.
    Nakayama, K.
    Sugawara, K.
    Arakane, T.
    Sekiba, Y.
    Takayama, A.
    Souma, S.
    Sato, T.
    Takahashi, T.
    Wang, Z.
    Dai, X.
    Fang, Z.
    Chen, G. F.
    Luo, J. L.
    Wang, N. L.
    [J]. EPL, 2008, 83 (04)
  • [8] Robustness of s-Wave Pairing in Electron-Overdoped A1-yFe2-xSe2 (A = K, Cs)
    Fang, Chen
    Wu, Yang-Le
    Thomale, Ronny
    Bernevig, B. Andrei
    Hu, Jiangping
    [J]. PHYSICAL REVIEW X, 2011, 1 (01): : 1 - 13
  • [9] Fe-based superconductivity with Tc=31 K bordering an antiferromagnetic insulator in (Tl,K) FexSe2
    Fang, Ming-Hu
    Wang, Hang-Dong
    Dong, Chi-Heng
    Li, Zu-Juan
    Feng, Chun-Mu
    Chen, Jian
    Yuan, H. Q.
    [J]. EPL, 2011, 94 (02)
  • [10] Reciprocal-space structure and dispersion of the magnetic resonant mode in the superconducting phase of RbxFe2-ySe2 single crystals
    Friemel, G.
    Park, J. T.
    Maier, T. A.
    Tsurkan, V.
    Li, Yuan
    Deisenhofer, J.
    von Nidda, H. -A. Krug
    Loidl, A.
    Ivanov, A.
    Keimer, B.
    Inosov, D. S.
    [J]. PHYSICAL REVIEW B, 2012, 85 (14)
12345