Excitation gaps in the orbitally degenerate Hubbard model
| Autor: | Maria Emilia Amendola, Canio Noce |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Physics
Hubbard model RANGE Degenerate energy levels Charge (physics) Condensed Matter Physics Symmetry (physics) SPIN-EXCITATION Exact results Quantum mechanics Quantum electrodynamics CORRELATED ELECTRON-SYSTEMS Condensed Matter::Strongly Correlated Electrons General Materials Science Ground state TRANSITION Excitation |
| Zdroj: | 18 (2006): 8345–8351. info:cnr-pdr/source/autori:Amendola, ME; Noce, C/titolo:Excitation gaps in the orbitally degenerate Hubbard model/doi:/rivista:/anno:2006/pagina_da:8345/pagina_a:8351/intervallo_pagine:8345–8351/volume:18 |
| ISSN: | 1361-648X 0953-8984 |
| DOI: | 10.1088/0953-8984/18/35/019 |
| Popis: | The excitation gaps for the two-orbital degenerate Hubbard model are investigated by applying a generalized version of Lieb's spin-reflection positivity. Combining the known exact results on the ground state, and making use of symmetry properties, we rigorously show that, at half-filling, the charge gaps are always larger than the spin-excitation gaps and properly defined orbital gaps. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|