Optical conductivity of Ba0.6K0.4Fe2As2: The effect of in-plane and out-of-plane doping in the superconducting gap

被引：29
|
作者：
Dai, Y. M. [1 ,2 ]
Xu, B. [2 ]
Shen, B. [2 ]
Wen, H. H. [2 ,3 ,4 ]
Qiu, X. G. [2 ]
Lobo, R. P. S. M. [1 ]
机构：
[1] UPMC, ESPCI ParisTech, CNRS, LPEM, F-75231 Paris 5, France
[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China
[3] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[4] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
来源：
EPL | 2013年 / 104卷 / 04期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1209/0295-5075/104/47006
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We measured the in-plane optical conductivity of a nearly optimally doped (T-c = 39.1K) single crystal of Ba0.6K0.4Fe2As2. Upon entering the superconducting state the optical conductivity vanishes below similar to 20meV, indicating a fully gapped system. A quantitative modeling of the optical response of this material requires two different isotropic gaps, the larger of which dominates the London penetration depth. The temperature dependence of these gaps indicate a strong interband interaction, but no impurity-scattering-induced pair breaking is present. This contrasts to the large residual conductivity observed in optimally doped BaFe1.84Co0.08As2 and strongly supports an s +/- gap symmetry for both compounds. Copyright (C) EPLA, 2013
引用
收藏
页数：6
相关论文
共 50 条
  • [41] Observation of Momentum-Confined In-Gap Impurity State in Ba0.6K0.4Fe2As2: Evidence for Antiphase s± Pairing
    Zhang, P.
    Richard, P.
    Qian, T.
    Shi, X.
    Ma, J.
    Zeng, L. -K.
    Wang, X. -P.
    Rienks, E.
    Zhang, C. -L.
    Dai, Pengcheng
    You, Y. -Z.
    Weng, Z. -Y.
    Wu, X. -X.
    Hu, J. P.
    Ding, H.
    [J]. PHYSICAL REVIEW X, 2014, 4 (03):
  • [42] Genuine electronic structure and superconducting gap structure in (Ba0.6K0.4)Fe2As2 superconductor
    Cai, Yongqing
    Huang, Jianwei
    Miao, Taimin
    Wu, Dingsong
    Gao, Qiang
    Li, Cong
    Xu, Yu
    Jia, Junjie
    Wang, Qingyan
    Huang, Yuan
    Liu, Guodong
    Zhang, Fengfeng
    Zhang, Shenjin
    Yang, Feng
    Wang, Zhimin
    Peng, Qinjun
    Xu, Zuyan
    Zhao, Lin
    Zhou, Xingjiang
    [J]. SCIENCE BULLETIN, 2021, 66 (18) : 1839 - 1848
  • [43] FE Nonlinear Analysis for Multiplanar CHS KK-joint with In-plane Gap and Out-of-plane Overlap
    Cui, Shiqi
    Sun, Jiandong
    Lv, Junli
    Yang, Chun
    [J]. ADVANCES IN STRUCTURAL ENGINEERING, PTS 1-3, 2011, 94-96 : 443 - +
  • [44] Role of heat and mechanical treatments in the fabrication of superconducting Ba0.6K0.4Fe2As2 ex situ powder-in-tube tapes
    Malagoli, A.
    Wiesenmayer, E.
    Marchner, S.
    Johrendt, D.
    Genovese, A.
    Putti, M.
    [J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2015, 28 (09):
  • [45] Microstructure and Flux Pinning of Reacted-and-Pressed, Polycrystalline Ba0.6K0.4Fe2As2 Powders
    Koblischka, Michael R.
    Koblischka-Veneva, Anjela
    Schmauch, Joerg
    Murakami, Masato
    [J]. MATERIALS, 2019, 12 (13)
  • [46] In-plane and out-of-plane anisotropy in the optical and dielectric properties of YBa2Cu3O7-x superconducting film
    Wang, Yueming
    Sun, Weixuan
    Zhao, Minglin
    Li, Yongfu
    Wei, Mingyang
    Jin, Kui
    Li, Qian
    Zhou, Xiang'an
    Han, Yating
    Lian, Jie
    [J]. APPLIED SURFACE SCIENCE, 2024, 673
  • [47] Bi2Te3: implications of the rhombohedral k-space texture on the evaluation of the in-plane/out-of-plane conductivity anisotropy
    Zahn, Peter
    Hinsche, Nicki F.
    Yavorsky, B. Yu
    Mertig, Ingrid
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2011, 23 (50)
  • [48] Out-of-plane and in-plane anisotropy of upper critical field in MgB2
    Shi, ZX
    Tokunaga, M
    Tamegai, T
    Takano, Y
    Togano, K
    Kito, H
    Ihara, H
    [J]. PHYSICAL REVIEW B, 2003, 68 (10)
  • [49] Observation of a ubiquitous three-dimensional superconducting gap function in optimally doped Ba 0.6 K 0.4 Fe 2 As 2
    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.
    Ding H.
    [J]. Nature Physics, 2011, 7 (03) : 198 - 202
  • [50] In-Plane and Out-of-Plane Diffraction of H2 from Ru(001)
    Nieto, Pablo
    Barredo, Daniel
    Farias, Daniel
    Miranda, Rodolfo
    [J]. JOURNAL OF PHYSICAL CHEMISTRY A, 2011, 115 (25): : 7283 - 7290
12345