Differential conductance and defect states in the heavy-fermion superconductor CeCoIn5
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We demonstrate that the electronic band structure extracted from quasiparticle interference spectroscopy [Nat. Phys. 9, 468 (2013)] and the theoretically computed form of the superconducting gaps [Proc. Natl. Acad. Sci. USA 111, 11663 (2014)] can be used to understand the dI/dV line shape measured in the normal and superconducting state of CeCoIn5 [Nat. Phys. 9, 474 (2013)]. In particular, the dI/dV line shape, and the spatial structure of defect-induced impurity states, reflects the existence of multiple superconducting gaps of dx2-y2 symmetry. These results strongly support a recently proposed microscopic origin of the unconventional superconducting state.
Van Dyke , J S , Davis , J C S & Morr , D K 2016 , ' Differential conductance and defect states in the heavy-fermion superconductor CeCoIn 5 ' , Physical Review. B, Condensed matter and materials physics , vol. 93 , no. 4 , 041107 . https://doi.org/10.1103/PhysRevB.93.041107
Physical Review. B, Condensed matter and materials physics
© 2016 American Physical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://dx.doi.org/10.1103/PhysRevB.93.041107
DescriptionThis work was supported by the U. S. Department of Energy, Office of Science, Basic Energy Sciences, under Award No. DEFG02- 05ER46225 (J.S.V. and D.K.M.) and used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-FG02-05ER46225 (J.S.V. and D.K.M.). Experimental contributions to this research were supported by U.S. DOE under Contract No. DE-AC02-98CH10886 (J.C.S.D.).
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