Differential conductance and defect states in the heavy-fermion superconductor CeCoIn5

John S. Van Dyke; J. C. Seamus Davis; Dirk K. Morr

doi:10.1103/PhysRevB.93.041107

Differential conductance and defect states in the heavy-fermion superconductor CeCoIn₅

John S. Van Dyke^*, J. C. Seamus Davis, Dirk K. Morr

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

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 d_x²-y² symmetry. These results strongly support a recently proposed microscopic origin of the unconventional superconducting state.

Original language	English
Article number	041107
Number of pages	5
Journal	Physical Review. B, Condensed matter and materials physics
Volume	93
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.93.041107
Publication status	Published - 22 Jan 2016

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Davis_2016_PhysRevB_CeCoIn5_FinalPubVersion
© 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
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Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems
Wahl, P. (PI), Baumberger, F. (CoI), Davis, J. C. (CoI), Green, A. (CoI), Hooley, C. (CoI), Keeling, J. M. J. (CoI) & Mackenzie, A. (CoI)
EPSRC
1/09/11 → 31/08/17
Project: Standard

Cite this

@article{6468bc8402bb4a4a9f5343b1808e5306,

title = "Differential conductance and defect states in the heavy-fermion superconductor CeCoIn5",

abstract = "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.",

author = "{Van Dyke}, {John S.} and Davis, {J. C. Seamus} and Morr, {Dirk K.}",

note = "This 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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doi = "10.1103/PhysRevB.93.041107",

language = "English",

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AU - Davis, J. C. Seamus

AU - Morr, Dirk K.

N1 - This 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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N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevB.93.041107

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JF - Physical Review. B, Condensed matter and materials physics

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Differential conductance and defect states in the heavy-fermion superconductor CeCoIn5

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Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

Cite this

Differential conductance and defect states in the heavy-fermion superconductor CeCoIn₅