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Disentangling electron-boson interactions on the surface of a familiar ferromagnet

Røst, Håkon I. ; Mazzola, Federico ; Bakkelund, Johannes ; Åsland, Anna Cecilie ; Hu, Jinbang ; Cooil, Simon P. ; Polley, Craig M. LU and Wells, Justin W. LU (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
; ; ; ; ; ; and
organization
publishing date
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&gt;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}},
}