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Frontiers of Physics

ISSN 2095-0462

ISSN 2095-0470(Online)

CN 11-5994/O4

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Front. Phys.    2016, Vol. 11 Issue (3) : 117402    https://doi.org/10.1007/s11467-016-0549-6
RESEARCH ARTICLE
Spatial modulation of unitary impurity-induced resonances in superconducting CeCoIn5
Ge Zhang1,Bin Liu1,*(),Yi-Feng Yang2,3,Shiping Feng4
1 Department of Physics, Beijing Jiaotong University, Beijing 100044, China
2 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3 Collaborative Innovation Center of Quantum Matter, Beijing 100190, China
4 Department of Physics, Beijing Normal University, Beijing 100875, China
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Abstract

Motivated by recent experimental progress in high-resolution scanning tunneling microscopy (STM) techniques, we investigate the local quasiparticle density of states around a unitary impurity in the heavy-fermion superconductor CeCoIn5. Based on the T -matrix approach we obtain a sharp nearly zero-energy resonance state in the strong impurity potential scattering localized around the impurity and find qualitative differences in the spatial pattern of the tunneling conductance modulated by the nodal structure of the superconducting gap. These unique features may be used as a probe of the superconducting gap symmetry and, in combination with further STM measurements, may help to confirm the dx2−y2 pairing in CeCoIn5 at ambient pressure.
Keywords pairing symmetries      effects of disorder      tunneling phenomena     
Corresponding Author(s): Bin Liu   
Online First Date: 01 February 2016    Issue Date: 08 June 2016
 Cite this article:   
Ge Zhang,Bin Liu,Yi-Feng Yang, et al. Spatial modulation of unitary impurity-induced resonances in superconducting CeCoIn5[J]. Front. Phys. , 2016, 11(3): 117402.
 URL:  
https://academic.hep.com.cn/fop/EN/10.1007/s11467-016-0549-6
https://academic.hep.com.cn/fop/EN/Y2016/V11/I3/117402
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