Contrasting impurity scattering and pair-breaking effects by doping Mn and Zn in Ba0.5K0.5Fe2As2

被引：62
作者：
Cheng, Peng [1 ,2 ]
Shen, Bing [1 ,2 ]
Hu, Jiangping [1 ,2 ,3 ]
Wen, Hai-Hu [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[3] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 17期
关键词：
SUPERCONDUCTOR;
D O I：
10.1103/PhysRevB.81.174529
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Resistivity, Hall effect, magnetoresistance and dc magnetization were measured in Mn- and Zn-doped Ba0.5K0.5Fe2As2 samples. It is found that the Mn doping can depress the superconducting transition temperature drastically with a rate of Delta T-c/Mn-1%=-4.2 K, while that by Zn doping is negligible. Detailed analysis reveals that the Mn doping enhances the residual resistivity (rho(0)) significantly, and induces strong local magnetic moments (similar to 2.58 mu(B)) which play as pair breakers. While the impurity scattering measured by rho(0) in the Zn-doped samples is much weaker, accompanied by a negligible pair-breaking effect. A possible explanation is that the impurity scattering by the Zn impurities are mainly small angle scattering (or small momentum transfer), therefore it cannot break the pairing induced by the interpocket scattering and thus affects the superconducting transition temperature weakly.
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页数：6
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共 41 条
[1]  
ABRIKOSOV AA, 1961, SOV PHYS JETP-USSR, V12, P1243
[2]   THEORY OF DIRTY SUPERCONDUCTORS [J].
ANDERSON, PW .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1959, 11 (1-2) :26-30
[3]   Impurity effects on the ±s-wave state of the iron-based superconductors [J].
Bang, Yunkyu ;
Choi, Han-Yong ;
Won, Hyekyung .
PHYSICAL REVIEW B, 2009, 79 (05)
[4]   A BCS-like gap in the superconductor SmFeAsO0.85F0.15 [J].
Chen, T. Y. ;
Tesanovic, Z. ;
Liu, R. H. ;
Chen, X. H. ;
Chien, C. L. .
NATURE, 2008, 453 (7199) :1224-1227
[5]   Multiband magnetism and superconductivity in Fe-based compounds [J].
Cvetkovic, V. ;
Tesanovic, Z. .
EPL, 2009, 85 (03)
[6]   Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2 [J].
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. .
EPL, 2008, 83 (04)
[7]   Roles of multiband effects and electron-hole asymmetry in the superconductivity and normal-state properties of Ba(Fe1-xCox)2As2 [J].
Fang, Lei ;
Luo, Huiqian ;
Cheng, Peng ;
Wang, Zhaosheng ;
Jia, Ying ;
Mu, Gang ;
Shen, Bing ;
Mazin, I. I. ;
Shan, Lei ;
Ren, Cong ;
Wen, Hai-Hu .
PHYSICAL REVIEW B, 2009, 80 (14)
[8]   Evidence for a Nodal-Line Superconducting State in LaFePO [J].
Fletcher, J. D. ;
Serafin, A. ;
Malone, L. ;
Analytis, J. G. ;
Chu, J. -H. ;
Erickson, A. S. ;
Fisher, I. R. ;
Carrington, A. .
PHYSICAL REVIEW LETTERS, 2009, 102 (14)
[9]   MAGNETIC PAIR-BREAKING EFFECTS - MOMENT FORMATION AND CRITICAL DOPING LEVEL IN SUPERCONDUCTING LA1.85SR0.15CU1-XAXO4 SYSTEMS (A = FE, CO, NI, ZN, GA, AL) [J].
GANG, X ;
CIEPLAK, MZ ;
XIAO, JQ ;
CHIEN, CL .
PHYSICAL REVIEW B, 1990, 42 (13) :8752-8755
[10]   Unconventional London Penetration Depth in Single-Crystal Ba(Fe0.93Co0.07)2As2 Superconductors [J].
Gordon, R. T. ;
Ni, N. ;
Martin, C. ;
Tanatar, M. A. ;
Vannette, M. D. ;
Kim, H. ;
Samolyuk, G. D. ;
Schmalian, J. ;
Nandi, S. ;
Kreyssig, A. ;
Goldman, A. I. ;
Yan, J. Q. ;
Bud'ko, S. L. ;
Canfield, P. C. ;
Prozorov, R. .
PHYSICAL REVIEW LETTERS, 2009, 102 (12)
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