Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-06-21
Phil. Mag. 86, 1667 - 1687 (2006)
Physics
Condensed Matter
Strongly Correlated Electrons
17 pages, 12 figures
Scientific paper
10.1080/14786430500499363
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 $\theta$ and the Berry phase field flux per triangular plaquette $\phi$ 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 $\sigma_{xy}$ is derived explicitly from the Kubo formula and a direct calculation of the longitudinal conductivity $\sigma_{xx}$ shows the existence of a metal-insulator transition as a function of the canting angle $\theta$ (or flux density $\phi$). 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.
Campana Ilaria
Jug Giancarlo
Ziegler Klaus
No associations
LandOfFree
Quantized Transport in Two-Dimensional Spin-Ordered Structures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantized Transport in Two-Dimensional Spin-Ordered Structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantized Transport in Two-Dimensional Spin-Ordered Structures will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-480226