Two-particle self-consistent method for the multi-orbital Hubbard model
- One of the most challenging problems in solid state systems is the microscopic analysis of electronic correlations. A paramount minimal model that encodes correlation effects is the Hubbard Hamiltonian, which—regardless of its simplicity—is exactly solvable only in a few limiting cases and approximate many-body methods are required for its solution. In this review, an overview on the non-perturbative two-particle self-consistent method (TPSC), which was originally introduced to describe the electronic properties of the single-band Hubbard model, is presented. A detailed derivation of the multi-orbital generalization of TPSC is introduced here and particular features of the method on exemplary interacting models in comparison to dynamical mean-field theory results are discussed.
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| Author: | Karim Zantout, Steffen Backes, Roser ValentíORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-638711 |
| DOI: | https://doi.org/10.1002/andp.202000399 |
| ISSN: | 1521-3889 |
| Parent Title (German): | Annalen der Physik |
| Publisher: | Wiley-VCH |
| Place of publication: | Berlin |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2021/01/15 |
| Date of first Publication: | 2021/01/15 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2022/03/16 |
| Tag: | correlated electrons; multi-orbital Hubbard model; non-perturbative methods |
| Volume: | 533 |
| Issue: | 2, art. 2000399 |
| Page Number: | 19 |
| First Page: | 1 |
| Last Page: | 19 |
| Note: | R.V. acknowledges the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) for funding through TRR 288 - 422213477 (project B05). |
| HeBIS-PPN: | 49337776X |
| Institutes: | Physik |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - Namensnennung 4.0 |
