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  Spin excitations in the fully gapped hybridized two band superconductor

Akbari, A., & Thalmeier, P. (2021). Spin excitations in the fully gapped hybridized two band superconductor. Annals of Physics, 428: 168433, pp. 1-15. doi:10.1016/j.aop.2021.168433.

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 Creators:
Akbari, Alireza1, Author              
Thalmeier, Peter2, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2Peter Thalmeier, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863457              

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 Abstract: In f-electron heavy fermion superconductors the presence of a spin resonance in the inelastic magnetic response is commonly associated with an unconventional nodal gap function that is not fully symmetric. However it appears possible that the resonance is still observed even when the low temperature thermodynamic behavior suggests a fully gapped state. We investigate such possibility within a two-dimensional toy model of a hybridized superconductor with a fully symmetric s± unconventional symmetry with different sign of the gap function on disjoint Fermi surface sheets. We compute the collective magnetic response function in the hybridized superconducting state of the two-band model and show that the appearance of the resonance is also possible for the fully gapped state. © 2021 Elsevier Inc.

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Language(s): eng - English
 Dates: 2021-03-132021-03-13
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1016/j.aop.2021.168433
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Title: Annals of Physics
Source Genre: Journal
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Publ. Info: Orlando, Fla. : Academic Press
Pages: - Volume / Issue: 428 Sequence Number: 168433 Start / End Page: 1 - 15 Identifier: ISSN: 0003-4916
CoNE: https://pure.mpg.de/cone/journals/resource/954922644005