Quantized Transport in Two-Dimensional Spin-Ordered Structures
| dc.creator | Campana, Ilaria | |
| dc.creator | Jug, Giancarlo | |
| dc.creator | Ziegler, Klaus | |
| dc.date | 2005-06-21 | |
| dc.date.accessioned | 2026-07-07T06:28:50Z | |
| dc.date.available | 2026-07-07T06:28:50Z | |
| dc.description | We study in detail the transport properties of a model of conducting electrons in the presence of double-exchange between localized spins arranged on a 2D Kagome lattice, as introduced by Ohgushi, Murakami, and Nagaosa (2000). The relationship between the canting angle of the spin texture $θ$ and the Berry phase field flux per triangular plaquette $ϕ$ is derived explicitly and we emphasize the similarities between this model and Haldane's honeycomb lattice version of the quantum Hall effect (Haldane, 1988). The quantization of the transverse (Hall) conductivity $σ_{xy}$ is derived explicitly from the Kubo formula and a direct calculation of the longitudinal conductivity $σ_{xx}$ shows the existence of a metal-insulator transition as a function of the canting angle $θ$ (or flux density $ϕ$). This transition might be linked to that observable in the manganite compounds or in the pyrochlore ones, as the spin ordering changes from ferromagnetic to canted. | |
| dc.description | 17 pages, 12 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0506551 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0506551 | |
| dc.identifier | Phil. Mag. 86, 1667 - 1687 (2006) | |
| dc.identifier | doi:10.1080/14786430500499363 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/97832 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Quantized Transport in Two-Dimensional Spin-Ordered Structures | |
| dc.type | text |