Numéro
J. Phys. IV France
Volume 12, Numéro 9, November 2002
Page(s) 253 - 256
DOI http://dx.doi.org/10.1051/jp4:20020407


J. Phys. IV France
12 (2002) Pr9-253
DOI: 10.1051/jp4:20020407

Inhomogeneities in antiferromagnetic solids

F.V. Kusmartsev1, 2

1  Department of Physics, Loughborough University, Loughborough LE11 3TU, U.K.
2  Landau Institute, Moscow, Russia


Abstract
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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