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Frequency-dependent local interactions and low-energy effective models from electronic structure calculations
Open accessAbstract
We propose a systematic procedure for constructing effective models of strongly correlated materials. The parameters, in particular the on-site screened Coulomb interaction $U$, are calculated from first principles, using the random-phase approximation. We derive an expression for the frequency-dependent $U(\ensuremath{\omega})$ and show, for the case of nickel, that its high-frequency part has significant influence on the spectral functions. We propose a scheme for taking into account the energy dependence of $U(\ensuremath{\omega})$, so that a model with an energy-independent local interaction can still be used for low-energy properties.
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Cited by
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Metadata
- Authors
- Aryasetiawan, F., Imada, M., Georges, A., Kotliar, G., Biermann, S., & Lichtenstein, A. I.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2004-11-11
- Volume
- 70
- Issue
- 19
- ISSN
- 1098-0121 (ISSN-L)
- 1550-235X
- OpenAlex
- W1972871080
- Cited by
- 789
- References
- 0
- FWCI
- 5.47
- Type
- journal article
- Language
- en
- Open access
- green
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- Aryasetiawan, F., Imada, M., Georges, A., Kotliar, G., Biermann, S., & Lichtenstein, A. I. (2004). Frequency-dependent local interactions and low-energy effective models from electronic structure calculations. Physical Review B. https://doi.org/10.1103/physrevb.70.195104
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