Larmor precession in strongly correlated itinerant electron systems
(2023) In Communications Physics 6.- Abstract
- Many-electron systems undergo a collective Larmor precession in the presence of a magnetic field. In a paramagnetic metal, the resulting spin wave provides insight into the correlation effects generated by the electron-electron interaction. Here, we use dynamical mean-field theory to investigate the collective Larmor precession in the strongly correlated regime, where dynamical correlation effects such as quasiparticle lifetimes and non-quasiparticle states are essential. We study the spin excitation spectrum, which includes a dispersive Larmor mode as well as electron-hole excitations that lead to Stoner damping. We also extract the momentum-resolved damping of slow spin waves. The accurate theoretical description of these phenomena... (More)
- Many-electron systems undergo a collective Larmor precession in the presence of a magnetic field. In a paramagnetic metal, the resulting spin wave provides insight into the correlation effects generated by the electron-electron interaction. Here, we use dynamical mean-field theory to investigate the collective Larmor precession in the strongly correlated regime, where dynamical correlation effects such as quasiparticle lifetimes and non-quasiparticle states are essential. We study the spin excitation spectrum, which includes a dispersive Larmor mode as well as electron-hole excitations that lead to Stoner damping. We also extract the momentum-resolved damping of slow spin waves. The accurate theoretical description of these phenomena relies on the Ward identity, which guarantees a precise cancellation of self-energy and vertex corrections at long wavelengths. Our findings pave the way towards a better understanding of spin wave damping in correlated materials. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/31a4f606-c6ca-4ab2-a9b8-b5c1df7aa59d
- author
- van Loon, Erik LU and Strand, Hugo
- organization
- publishing date
- 2023-10-13
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Communications Physics
- volume
- 6
- article number
- 289
- pages
- 9 pages
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:85174155303
- ISSN
- 2399-3650
- DOI
- 10.1038/s42005-023-01411-w
- project
- eSSENCE@LU 9:1 - Magnetic metals modelling
- Correlated materials beyond dynamical mean-field theory
- Plasmons out of equilibrium
- Compact descriptions of correlated electrons
- language
- English
- LU publication?
- yes
- id
- 31a4f606-c6ca-4ab2-a9b8-b5c1df7aa59d
- date added to LUP
- 2023-11-06 12:51:42
- date last changed
- 2023-11-07 13:52:19
@article{31a4f606-c6ca-4ab2-a9b8-b5c1df7aa59d,
abstract = {{Many-electron systems undergo a collective Larmor precession in the presence of a magnetic field. In a paramagnetic metal, the resulting spin wave provides insight into the correlation effects generated by the electron-electron interaction. Here, we use dynamical mean-field theory to investigate the collective Larmor precession in the strongly correlated regime, where dynamical correlation effects such as quasiparticle lifetimes and non-quasiparticle states are essential. We study the spin excitation spectrum, which includes a dispersive Larmor mode as well as electron-hole excitations that lead to Stoner damping. We also extract the momentum-resolved damping of slow spin waves. The accurate theoretical description of these phenomena relies on the Ward identity, which guarantees a precise cancellation of self-energy and vertex corrections at long wavelengths. Our findings pave the way towards a better understanding of spin wave damping in correlated materials.}},
author = {{van Loon, Erik and Strand, Hugo}},
issn = {{2399-3650}},
language = {{eng}},
month = {{10}},
publisher = {{Nature Publishing Group}},
series = {{Communications Physics}},
title = {{Larmor precession in strongly correlated itinerant electron systems}},
url = {{http://dx.doi.org/10.1038/s42005-023-01411-w}},
doi = {{10.1038/s42005-023-01411-w}},
volume = {{6}},
year = {{2023}},
}