Disentangling electron-boson interactions on the surface of a familiar ferromagnet
(2024) In Physical Review B 109(3).- Abstract
We report energy renormalizations from electron-phonon and electron-magnon interactions in spin minority surface resonances on Ni(111). The different interactions are identified, disentangled, and quantified from the characteristic signatures they provide to the complex self-energy and the largely different binding energies at which they occur. The observed electron-magnon interactions exhibit a strong dependence on momentum and the electron energy band position in the bulk Brillouin zone. In contrast, electron-phonon interactions observed from the same bands appear to be relatively momentum and symmetry independent. Additionally, a moderately strong (λ>0.5) electron-phonon interaction is distinguished from a near-parabolic spin... (More)
We report energy renormalizations from electron-phonon and electron-magnon interactions in spin minority surface resonances on Ni(111). The different interactions are identified, disentangled, and quantified from the characteristic signatures they provide to the complex self-energy and the largely different binding energies at which they occur. The observed electron-magnon interactions exhibit a strong dependence on momentum and the electron energy band position in the bulk Brillouin zone. In contrast, electron-phonon interactions observed from the same bands appear to be relatively momentum and symmetry independent. Additionally, a moderately strong (λ>0.5) electron-phonon interaction is distinguished from a near-parabolic spin majority band not crossing the Fermi level.
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- author
- Røst, Håkon I. ; Mazzola, Federico ; Bakkelund, Johannes ; Åsland, Anna Cecilie ; Hu, Jinbang ; Cooil, Simon P. ; Polley, Craig M. LU and Wells, Justin W. LU
- organization
- publishing date
- 2024-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B
- volume
- 109
- issue
- 3
- article number
- 035137
- publisher
- American Physical Society
- external identifiers
-
- scopus:85183026375
- ISSN
- 2469-9950
- DOI
- 10.1103/PhysRevB.109.035137
- language
- English
- LU publication?
- yes
- id
- 7b9fe82b-c6b9-41ce-84e3-77ed9be97f64
- date added to LUP
- 2024-02-21 14:05:40
- date last changed
- 2024-02-21 14:06:47
@article{7b9fe82b-c6b9-41ce-84e3-77ed9be97f64, abstract = {{<p>We report energy renormalizations from electron-phonon and electron-magnon interactions in spin minority surface resonances on Ni(111). The different interactions are identified, disentangled, and quantified from the characteristic signatures they provide to the complex self-energy and the largely different binding energies at which they occur. The observed electron-magnon interactions exhibit a strong dependence on momentum and the electron energy band position in the bulk Brillouin zone. In contrast, electron-phonon interactions observed from the same bands appear to be relatively momentum and symmetry independent. Additionally, a moderately strong (λ>0.5) electron-phonon interaction is distinguished from a near-parabolic spin majority band not crossing the Fermi level.</p>}}, author = {{Røst, Håkon I. and Mazzola, Federico and Bakkelund, Johannes and Åsland, Anna Cecilie and Hu, Jinbang and Cooil, Simon P. and Polley, Craig M. and Wells, Justin W.}}, issn = {{2469-9950}}, language = {{eng}}, number = {{3}}, publisher = {{American Physical Society}}, series = {{Physical Review B}}, title = {{Disentangling electron-boson interactions on the surface of a familiar ferromagnet}}, url = {{http://dx.doi.org/10.1103/PhysRevB.109.035137}}, doi = {{10.1103/PhysRevB.109.035137}}, volume = {{109}}, year = {{2024}}, }