Differential Conductance and Defect States in the Heavy Fermion Superconductor CeCoIn${}_5$

Abstract

We demonstrate that the electronic bandstructure extracted from quasi-particle interference spectroscopy [Nat. Phys. 9, 468 (2013)] and the theoretically computed form of the superconducting gaps [Proc. Nat. Acad. Sci. 111, 11663 (2014)] can be used to understand the $dI/dV$ lineshape measured in the normal and superconducting state of CeCoIn${}_5$ [Nat. Phys. 9, 474 92103)]. In particular, the $dI/dV$ lineshape, and the spatial structure of defect-induced impurity states, reflects the existence of multiple superconducting gaps of $d_{x^2-y^2}$-symmetry. These results strongly support a recently proposed microscopic origin of the unconventional superconducting state.

References in corpus (14)

• Spin resonance in the d-wave superconductor CeCoIn5
• Visualizing Nodal Heavy Fermion Superconductivity in CeCoIn5
• Concepts relating magnetic interactions, intertwined electronic orders and strongly correlated superconductivity
• Andreev Reflection in Heavy-Fermion Superconductors and Order Parameter Symmetry in CeCoIn_5
• Nonvanishing Energy Scales at the Quantum Critical Point of CeCoIn5
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• Direct Evidence for a Magnetic f-electron Mediated Cooper Pairing Mechanism of Heavy Fermion Superconductivity in CeCoIn5
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• d-wave superconductivity in the frustrated two-dimensional periodic Anderson model
• The Emergence of Superconductivity in Heavy Electron Materials
• Behavior of the Quantum Critical Point and the Fermi-liquid Domain in the Heavy Fermion Superconductor CeCoIn5 studied by resistivity
• Molecular Pairing and Fully-Gapped Superconductivity in Yb doped CeCoIn5
• Landau Renormalizations of Superfluid density in Heavy Fermion Superconductor CeCoIn5
• Nonmagnetic impurity resonance states as a test of superconducting pairing symmetry in CeCoIn${}_5$

Cited by in corpus (6)

• Unconventional Superconductivity
• Orbital superconductivity, defects and pinned nematic fluctuations in the doped iron chalcogenide FeSe${}_{0.45}$Te${}_{0.55}$
• Visualizing Heavy Fermion Confinement and Pauli-Limited Superconductivity in Layered CeCoIn5
• Real-space multiple scattering theory for superconductors with impurities
• Hybridization-Controlled Pseudogap State in the Quantum Critical Superconductor CeCoIn5
• Magnetic impurities on superconducting Pb surfaces