Spin Resonance in the d-Wave Superconductor CeCoIn5

Christopher Stock; Collin Broholm; J Hudis; H Kang; C Petrovic

doi:10.1103/PhysRevLett.100.087001

Spin Resonance in the d-Wave Superconductor CeCoIn5

Christopher Stock, Collin Broholm, J Hudis, H Kang, C Petrovic

School of Physics and Astronomy

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

Abstract

Neutron scattering is used to probe antiferromagnetic spin fluctuations in the d-wave heavy fermion superconductor CeCoIn5 (Tc=2.3 K). Superconductivity develops from a state with slow (ℏΓ=0.3±0.15 meV) commensurate [Q0=(1/2,1/2,1/2)] antiferromagnetic spin fluctuations and nearly isotropic spin correlations. The characteristic wave vector in CeCoIn5 is the same as CeIn3 but differs from the incommensurate wave vector measured in antiferromagnetically ordered CeRhIn5. A sharp spin resonance (ℏΓ<0.07 meV) at ℏω=0.60±0.03 meV develops in the superconducting state removing spectral weight from low-energy transfers. The presence of a resonance peak is indicative of strong coupling between f-electron magnetism and superconductivity and consistent with a d-wave gap order parameter satisfying Δ(q+Q0)=-Δ(q).

Original language	English
Article number	087001
Number of pages	4
Journal	Physical Review Letters
Volume	100
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.100.087001
Publication status	Published - 28 Feb 2008

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title = "Spin Resonance in the d-Wave Superconductor CeCoIn5",

abstract = "Neutron scattering is used to probe antiferromagnetic spin fluctuations in the d-wave heavy fermion superconductor CeCoIn5 (Tc=2.3 K). Superconductivity develops from a state with slow (ℏΓ=0.3±0.15 meV) commensurate [Q0=(1/2,1/2,1/2)] antiferromagnetic spin fluctuations and nearly isotropic spin correlations. The characteristic wave vector in CeCoIn5 is the same as CeIn3 but differs from the incommensurate wave vector measured in antiferromagnetically ordered CeRhIn5. A sharp spin resonance (ℏΓ<0.07 meV) at ℏω=0.60±0.03 meV develops in the superconducting state removing spectral weight from low-energy transfers. The presence of a resonance peak is indicative of strong coupling between f-electron magnetism and superconductivity and consistent with a d-wave gap order parameter satisfying Δ(q+Q0)=-Δ(q).",

author = "Christopher Stock and Collin Broholm and J Hudis and H Kang and C Petrovic",

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doi = "10.1103/PhysRevLett.100.087001",

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journal = "Physical Review Letters",

issn = "1079-7114",

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T1 - Spin Resonance in the d-Wave Superconductor CeCoIn5

AU - Stock, Christopher

AU - Broholm, Collin

AU - Hudis, J

AU - Kang, H

AU - Petrovic, C

PY - 2008/2/28

Y1 - 2008/2/28

N2 - Neutron scattering is used to probe antiferromagnetic spin fluctuations in the d-wave heavy fermion superconductor CeCoIn5 (Tc=2.3 K). Superconductivity develops from a state with slow (ℏΓ=0.3±0.15 meV) commensurate [Q0=(1/2,1/2,1/2)] antiferromagnetic spin fluctuations and nearly isotropic spin correlations. The characteristic wave vector in CeCoIn5 is the same as CeIn3 but differs from the incommensurate wave vector measured in antiferromagnetically ordered CeRhIn5. A sharp spin resonance (ℏΓ<0.07 meV) at ℏω=0.60±0.03 meV develops in the superconducting state removing spectral weight from low-energy transfers. The presence of a resonance peak is indicative of strong coupling between f-electron magnetism and superconductivity and consistent with a d-wave gap order parameter satisfying Δ(q+Q0)=-Δ(q).

AB - Neutron scattering is used to probe antiferromagnetic spin fluctuations in the d-wave heavy fermion superconductor CeCoIn5 (Tc=2.3 K). Superconductivity develops from a state with slow (ℏΓ=0.3±0.15 meV) commensurate [Q0=(1/2,1/2,1/2)] antiferromagnetic spin fluctuations and nearly isotropic spin correlations. The characteristic wave vector in CeCoIn5 is the same as CeIn3 but differs from the incommensurate wave vector measured in antiferromagnetically ordered CeRhIn5. A sharp spin resonance (ℏΓ<0.07 meV) at ℏω=0.60±0.03 meV develops in the superconducting state removing spectral weight from low-energy transfers. The presence of a resonance peak is indicative of strong coupling between f-electron magnetism and superconductivity and consistent with a d-wave gap order parameter satisfying Δ(q+Q0)=-Δ(q).

U2 - 10.1103/PhysRevLett.100.087001

DO - 10.1103/PhysRevLett.100.087001

M3 - Article

SN - 1079-7114

VL - 100

JO - Physical Review Letters

JF - Physical Review Letters

IS - 8

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ER -

Spin Resonance in the d-Wave Superconductor CeCoIn5

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