Solution of quantum double exchange on the complete graph from spl(2,1) dynamical supersymmetry
| dc.creator | Penc, Karlo | |
| dc.creator | Lacaze, Robert | |
| dc.date | 1998-06-09 | |
| dc.date.accessioned | 2026-07-07T03:10:48Z | |
| dc.date.available | 2026-07-07T03:10:48Z | |
| dc.description | The exact and analytical low energy spectrum of the ferromagnetic Kondo lattice model on a complete graph extended with on-site repulsion $U$ is obtained in terms of a dynamical spl(2,1) supersymmetry in the limit of infinitely strong Hund's coupling (double exchange). Furthermore, we show that for the particular value of $U=J_H/2$ the supersymmetry is not constrained to infinite $J_H/t$ only and we calculate the energy including the $t^2/J_H$ corrections analytically and we give numerical evidence which suggest that the Kondo Hamiltonian is itself supersymmetric for any $J_H/t$. On a $N$ site graph, the ferromagnetic ground state is realized for 1 and $N$+1 electrons only. In the leading order in the value of the core spin, the quantum and semiclassical spectra are identical. | |
| dc.description | 4 pages, 1 figure included, revtex | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9806116 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9806116 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/28345 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Solution of quantum double exchange on the complete graph from spl(2,1) dynamical supersymmetry | |
| dc.type | text |