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

Davis, James C.; Morr, Dirk K.

doi:10.1103/PhysRevB.93.041107

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

Journal Article · Fri Jan 22 00:00:00 EST 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.93.041107· OSTI ID:1246798

Davis, James C. ^[1]; Morr, Dirk K. ^[2]

Cornell Univ., Ithaca, NY (United States); Univ. of St. Andrews, Scotland (United Kingdom)
Univ. of Illinois at Chicago, Chicago, IL (United States)

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. As a result, these results strongly support a recently proposed microscopic origin of the unconventional superconducting state.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC00112704; FG02-05ER46225; AC02-98CH10886

OSTI ID:: 1246798

Alternate ID(s):: OSTI ID: 1235783

Report Number(s):: BNL-111974-2016-JA; PRBMDO; R&D Project: PM007; KC0201010

Journal Information:: Physical Review B, Vol. 93, Issue 4; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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Cited By (4)

Visualizing heavy fermion confinement and Pauli-limited superconductivity in layered CeCoIn5 Gyenis, András; Feldman, Benjamin E.; Randeria, Mallika T. Nature Communications, Vol. 9, Issue 1 https://doi.org/10.1038/s41467-018-02841-9	journal	February 2018
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