Inhomogeneous Phases in a Double-Exchange Magnet with Long Range Coulomb Interactions
| dc.creator | Wachtel, Gideon | |
| dc.creator | Orgad, Dror | |
| dc.creator | Golosov, D. I. | |
| dc.date | 2008-08-17 | |
| dc.date | 2009-01-05 | |
| dc.date.accessioned | 2026-07-07T12:23:35Z | |
| dc.date.available | 2026-07-07T12:23:35Z | |
| dc.description | We consider a model with competing double-exchange (ferromagnetic) and super-exchange (anti-ferromagnetic) interactions in the regime where phase separation takes place. The presence of a long range Coulomb interaction frustrates a macroscopic phase separation, and favors microscopically inhomogeneous configurations. We use the variational Hartree-Fock approach, in conjunction with Monte-Carlo simulations to study the geometry of such configurations in a two-dimensional system. We find that an array of diamond shaped ferromagnetic droplets is the preferred configuration at low electronic densities, while alternating ferromagnetic and anti-ferromagnetic diagonal stripes emerge at higher densities. These findings are expected to be relevant for thin films of colossal magneto-resistive manganates. | |
| dc.description | 15 pages, 9 figures. Journal Ref. added, errors corrected | |
| dc.identifier | https://arxiv.org/abs/0808.2290 | |
| dc.identifier | http://arxiv.org/abs/0808.2290 | |
| dc.identifier | Phys. Rev. B 78, 184433 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.184433 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/214037 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Inhomogeneous Phases in a Double-Exchange Magnet with Long Range Coulomb Interactions | |
| dc.type | text |