Magnetism of one-dimensional Wigner lattices and its impact on charge order
| dc.creator | Daghofer, M. | |
| dc.creator | Noack, R. M. | |
| dc.creator | Horsch, P. | |
| dc.date | 2007-11-13 | |
| dc.date | 2008-11-21 | |
| dc.date.accessioned | 2026-07-07T10:19:35Z | |
| dc.date.available | 2026-07-07T10:19:35Z | |
| dc.description | The magnetic phase diagram of the quarter-filled generalized Wigner lattice with nearest- and next-nearest-neighbor hopping t_1 and t_2 is explored. We find a region at negative t_2 with fully saturated ferromagnetic ground states that we attribute to kinetic exchange. Such interaction disfavors antiferromagnetism at t_2 <0 and stems from virtual excitations across the charge gap of the Wigner lattice, which is much smaller than the Mott-Hubbard gap proportional to U. Remarkably, we find a strong dependence of the charge structure factor on magnetism even in the limit U to infinity, in contrast to the expectation that charge ordering in the Wigner lattice regime should be well described by spinless fermions. Our results, obtained using the density-matrix renormalization group and exact diagonalization, can be transparently explained by means of an effective low-energy Hamiltonian. | |
| dc.identifier | https://arxiv.org/abs/0711.1990 | |
| dc.identifier | http://arxiv.org/abs/0711.1990 | |
| dc.identifier | Phys. Rev. B 78, 205115 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.205115 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/174562 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Magnetism of one-dimensional Wigner lattices and its impact on charge order | |
| dc.type | text |