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Electron-electron versus electron-phonon interactions in lattice models: Screening effects described by a density functional theory approach

Vinas Boström, Emil LU ; Helmer, Pernilla ; Werner, Philipp and Verdozzi, Claudio LU (2019) In Physical Review Research 1(1).
Abstract
We address the interplay of electron-electron (e-e) and electron-phonon (e-ph) interactions in the Hubbard- Holstein model, using a two-component density functional theory. Exchange-correlation potentials constructed via dynamical mean field theory for a D = ∞ Bethe lattice and analytically for an isolated site give a new perspective on e-ph screening of the e-e interactions and its effect on the charge- and spin-Kondo regimes. Comparisons to exact benchmarks show that the approach is suitable to describe transport properties and real- time dynamics in homogeneous and inhomogeneous lattice systems.
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
DFT functionals, electron-phonon interactions
in
Physical Review Research
volume
1
issue
1
article number
013017
publisher
American Physical Society
external identifiers
  • scopus:85077916638
ISSN
2643-1564
DOI
10.1103/PhysRevResearch.1.013017
language
English
LU publication?
yes
id
062b6388-6ea2-408f-915f-09d571ede42d
date added to LUP
2019-11-21 09:54:24
date last changed
2025-10-14 10:02:10
@article{062b6388-6ea2-408f-915f-09d571ede42d,
  abstract     = {{We address the interplay of electron-electron (e-e) and electron-phonon (e-ph) interactions in the Hubbard- Holstein model, using a two-component density functional theory. Exchange-correlation potentials constructed via dynamical mean field theory for a D = ∞ Bethe lattice and analytically for an isolated site give a new perspective on e-ph screening of the e-e interactions and its effect on the charge- and spin-Kondo regimes. Comparisons to exact benchmarks show that the approach is suitable to describe transport properties and real- time dynamics in homogeneous and inhomogeneous lattice systems.}},
  author       = {{Vinas Boström, Emil and Helmer, Pernilla and Werner, Philipp and Verdozzi, Claudio}},
  issn         = {{2643-1564}},
  keywords     = {{DFT functionals; electron-phonon interactions}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{1}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Research}},
  title        = {{Electron-electron versus electron-phonon interactions in lattice models: Screening effects described by a density functional theory approach}},
  url          = {{http://dx.doi.org/10.1103/PhysRevResearch.1.013017}},
  doi          = {{10.1103/PhysRevResearch.1.013017}},
  volume       = {{1}},
  year         = {{2019}},
}