Tunneling estimates of paramagnon suppression of superconductivity in transition metals

D. M. Burnell; John Zasadzinski; R. J. Noer; E. L. Wolf; G. B. Arnold

doi:10.1016/0038-1098(82)90721-9

Tunneling estimates of paramagnon suppression of superconductivity in transition metals

D. M. Burnell, John Zasadzinski, R. J. Noer, E. L. Wolf, G. B. Arnold

Applied Physics

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

Abstract

New experimental estimates are given of the separate electron-phonon (λ_ph) and paramagnon (λ_S) contributions to mass renormalization for the transition metals Nb and V, from recent tunneling results. Our analysis, which is the first of its kind, is based on the recent demonstration of Daams, Mitrovic, and Carbotte of a simple rescaling of the Eliashberg equations using an effective coupling parameter λ_ph (1+λ_S). The results provide a consistent picture of superconductivity in these transition elements from tunneling, in substantially improved agreement with other measurements. We conclude that spin fluctuations reduce the electron-phonon T_c values in Nb and V by 25% and 45%, respectively.

Original language	English (US)
Pages (from-to)	637-641
Number of pages	5
Journal	Solid State Communications
Volume	41
Issue number	9
DOIs	https://doi.org/10.1016/0038-1098(82)90721-9
State	Published - Mar 1982

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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@article{f565c416ac574ce7aec76b549f02a9ae,

title = "Tunneling estimates of paramagnon suppression of superconductivity in transition metals",

abstract = "New experimental estimates are given of the separate electron-phonon (λph) and paramagnon (λS) contributions to mass renormalization for the transition metals Nb and V, from recent tunneling results. Our analysis, which is the first of its kind, is based on the recent demonstration of Daams, Mitrovic, and Carbotte of a simple rescaling of the Eliashberg equations using an effective coupling parameter λph (1+λS). The results provide a consistent picture of superconductivity in these transition elements from tunneling, in substantially improved agreement with other measurements. We conclude that spin fluctuations reduce the electron-phonon Tc values in Nb and V by 25% and 45%, respectively.",

author = "Burnell, {D. M.} and John Zasadzinski and Noer, {R. J.} and Wolf, {E. L.} and Arnold, {G. B.}",

note = "Funding Information: An important step in this direction has been made very recently by Daams, Mitrovic, and Carbotte' (DMC), who have demonstrated an accurate and workable resealing analysis of the effects of paramagnons on the microscopic superconducting properties. This analysis makes *Operated for the U.S. Department of Energy by Iowa State University under contract No. W-7405-Eng-82. This research was supported by the Director for Energy Research, Office of Basic Energy Sciences, WPAS-KC-02-02-02. Present Address: Solid State Science Division, Argonne National Laboratory, Argonne, IL 60439. Permanent address: Carleton College, Northfield, MN 55057.",

year = "1982",

month = mar,

doi = "10.1016/0038-1098(82)90721-9",

language = "English (US)",

volume = "41",

pages = "637--641",

journal = "Solid State Communications",

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T1 - Tunneling estimates of paramagnon suppression of superconductivity in transition metals

AU - Burnell, D. M.

AU - Zasadzinski, John

AU - Noer, R. J.

AU - Wolf, E. L.

AU - Arnold, G. B.

N1 - Funding Information: An important step in this direction has been made very recently by Daams, Mitrovic, and Carbotte' (DMC), who have demonstrated an accurate and workable resealing analysis of the effects of paramagnons on the microscopic superconducting properties. This analysis makes *Operated for the U.S. Department of Energy by Iowa State University under contract No. W-7405-Eng-82. This research was supported by the Director for Energy Research, Office of Basic Energy Sciences, WPAS-KC-02-02-02. Present Address: Solid State Science Division, Argonne National Laboratory, Argonne, IL 60439. Permanent address: Carleton College, Northfield, MN 55057.

PY - 1982/3

Y1 - 1982/3

N2 - New experimental estimates are given of the separate electron-phonon (λph) and paramagnon (λS) contributions to mass renormalization for the transition metals Nb and V, from recent tunneling results. Our analysis, which is the first of its kind, is based on the recent demonstration of Daams, Mitrovic, and Carbotte of a simple rescaling of the Eliashberg equations using an effective coupling parameter λph (1+λS). The results provide a consistent picture of superconductivity in these transition elements from tunneling, in substantially improved agreement with other measurements. We conclude that spin fluctuations reduce the electron-phonon Tc values in Nb and V by 25% and 45%, respectively.

AB - New experimental estimates are given of the separate electron-phonon (λph) and paramagnon (λS) contributions to mass renormalization for the transition metals Nb and V, from recent tunneling results. Our analysis, which is the first of its kind, is based on the recent demonstration of Daams, Mitrovic, and Carbotte of a simple rescaling of the Eliashberg equations using an effective coupling parameter λph (1+λS). The results provide a consistent picture of superconductivity in these transition elements from tunneling, in substantially improved agreement with other measurements. We conclude that spin fluctuations reduce the electron-phonon Tc values in Nb and V by 25% and 45%, respectively.

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JF - Solid State Communications

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Tunneling estimates of paramagnon suppression of superconductivity in transition metals

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