Spatial modulation of unitary impurity-induced resonances in superconducting CeCoIn5

doi:10.1007/s11467-016-0549-6

Frontiers of Physics

2016, Vol. 11

Issue (3): 117402 https://doi.org/10.1007/s11467-016-0549-6

本期目录

Spatial modulation of unitary impurity-induced resonances in superconducting CeCoIn₅

Ge Zhang¹,Bin Liu^1,^*(

),Yi-Feng Yang^2,³,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.

Key words： pairing symmetries effects of disorder tunneling phenomena

收稿日期: 2015-10-25 出版日期: 2016-06-08

Corresponding Author(s): Bin Liu

引用本文:

. [J]. Frontiers of Physics, 2016, 11(3): 117402.
Ge Zhang,Bin Liu,Yi-Feng Yang,Shiping Feng. Spatial modulation of unitary impurity-induced resonances in superconducting CeCoIn₅. Front. Phys. , 2016, 11(3): 117402.

链接本文:

https://academic.hep.com.cn/fop/CN/10.1007/s11467-016-0549-6
https://academic.hep.com.cn/fop/CN/Y2016/V11/I3/117402

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