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Charge Disproportionation, Mixed Valence, and Janus Effect in Multiorbital Systems: A Tale of Two Insulators.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Isidori, Aldo Berović, Maja Fanfarillo, Laura Medici, Luca De' Fabrizio, Michele Capone, Massimo |
| Copyright Year | 2019 |
| Abstract | Multiorbital Hubbard models host strongly correlated "Hund's metals" even for interactions much stronger than the bandwidth. We characterize this interaction-resilient metal as a mixed-valence state. In particular, it can be pictured as a bridge between two strongly correlated insulators: a high-spin Mott insulator and a charge-disproportionated insulator which is stabilized by a very large Hund's coupling. This picture is confirmed comparing models with negative and positive Hund's coupling for different fillings. Our results provide a characterization of the Hund's metal state and connect its presence with charge disproportionation, which has indeed been observed in chromates and proposed to play a role in iron-based superconductors. |
| Starting Page | 186401 |
| Ending Page | 186401 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| DOI | 10.1103/PhysRevLett.122.186401 |
| Alternate Webpage(s) | http://arxiv-export-lb.library.cornell.edu/pdf/1810.01899 |
| Alternate Webpage(s) | https://arxiv.org/pdf/1810.01899v1.pdf |
| PubMed reference number | 31144864 |
| Alternate Webpage(s) | https://doi.org/10.1103/PhysRevLett.122.186401 |
| Journal | Medline |
| Volume Number | 122 |
| Issue Number | 18 |
| Journal | Physical review letters |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
