Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-04-11
J. Phys.: Condens. Matter 17 (2005) 4333-4341
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages, 6 figures
Scientific paper
10.1088/0953-8984/17/27/009
There have been recent reports of charge ordering around $x=0.5$ in the bilayer manganites. At $x=0.5$, there appears to be a coexistence region of layered A-type antiferromagnetc and charge order. There are also reports of orbital order in this region without any Jahn-Teller effect. Based on physical grounds, this region is investigated from a model that incorporates the two $e_g$ orbitals at each Mn site and a near-neighbour Coulomb repulsion. It is shown that there indeed is both charge and orbital order close to the half-doped region coincident with a layered magnetic structure. Although the orbital order is known to drive the magnetic order, the layered magnetic structure is also favoured in this system by the lack of coherent transport across the planes and the reduced dimensionality of the lattice. The anisotropic hopping across the $e_g$ orbitals and the underlying layered structure largely determine the orbital arrangements in this region, while the charge order is primarily due to the long range interactions.
Beck Hans
Maitra Tulika
Taraphder A.
No associations
LandOfFree
Charge order and phase segregation in overdoped bilayer manganites 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 Charge order and phase segregation in overdoped bilayer manganites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge order and phase segregation in overdoped bilayer manganites will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-20882