Electron-electron versus electron-phonon interactions in lattice models: Screening effects described by a density functional theory approach
(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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/062b6388-6ea2-408f-915f-09d571ede42d
- author
- Vinas Boström, Emil LU ; Helmer, Pernilla ; Werner, Philipp and Verdozzi, Claudio LU
- organization
- publishing date
- 2019-08-29
- 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
- 2023-04-23 04:02:37
@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}}, }