Effective band-structure in the insulating phase versus strong dynamical correlations in metallic VO2
| dc.creator | Tomczak, Jan M. | |
| dc.creator | Aryasetiawan, Ferdi | |
| dc.creator | Biermann, Silke | |
| dc.date | 2007-04-06 | |
| dc.date | 2008-04-12 | |
| dc.date.accessioned | 2026-07-07T12:28:28Z | |
| dc.date.available | 2026-07-07T12:28:28Z | |
| dc.description | Using a general analytical continuation scheme for cluster dynamical mean field calculations, we analyze real-frequency self-energies, momentum-resolved spectral functions, and one-particle excitations of the metallic and insulating phases of VO2. While for the former dynamical correlations and lifetime effects prevent a description in terms of quasi-particles, the excitations of the latter allow for an effective band-structure. We construct an orbital-dependent, but static one-particle potential that reproduces the full many-body spectrum. Yet, the ground state is well beyond a static one-particle description. The emerging picture gives a non-trivial answer to the decade-old question of the nature of the insulator, which we characterize as a ``many-body Peierls'' state. | |
| dc.description | 5 pages, 4 color figures | |
| dc.identifier | https://arxiv.org/abs/0704.0902 | |
| dc.identifier | http://arxiv.org/abs/0704.0902 | |
| dc.identifier | Phys. Rev. B 78, 115103 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.115103 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/215552 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Effective band-structure in the insulating phase versus strong dynamical correlations in metallic VO2 | |
| dc.type | text |