J. Phys. IV France 12 (2002) Pr9-253
Inhomogeneities in antiferromagnetic solidsF.V. Kusmartsev1, 2
1 Department of Physics, Loughborough University, Loughborough LE11 3TU, U.K.
2 Landau Institute, Moscow, Russia
We find that in narrow hand anti-ferro-magnetic (AF) solids described by general t-J model there may arise electronic molecules or clusters consisting of holes. These holes are segregated around the topological defects such as loops of anti-phase domain walls. The loops are naturally self-organized into the closed loops of triangular, square, rectangular or other form depending on physical situations. This kind of electron molecules is spontaneously formed in AF background and constitute a new type of elementary excitations of the AF solids. We find that the size and shape of these e-molecules depend mostly on the AF coupling J and the bandwidth 4t as well as on the inter-site Coulomb repulsion between holes.
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