Condensed Matter Physics, 2009, vol. 12, No. 3, pp. 331-342

Title: Approximate eigenvalue determination of geometrically frustrated magnetic molecules
  R. Schnalle (Universität Osnabrück, Fachbereich Physik, D-49069 Osnabrück, Germany) ,
  A.M. Läuchli (Max Planck Institut für Physik komplexer Systeme, Nöthnitzerstr. 38, D-01187 Dresden, Germany) ,
  J. Schnack (Universität Bielefeld, Fakultät für Physik, Postfach 100131, D-33501 Bielefeld, Germany)

Geometrically frustrated magnetic molecules have attracted a lot of interest in the field of molecular magnetism as well as frustrated Heisenberg antiferromagnets. In this article we demonstrate how an approximate diagonalization scheme can be used in order to obtain thermodynamic and spectroscopic information about frustrated magnetic molecules. To this end we theoretically investigate an antiferromagnetically coupled spin system with cuboctahedral structure modeled by an isotropic Heisenberg Hamiltonian.

Key words: magnetic molecules, Heisenberg model, geometric frustration, irreducible tensor operator technique, approximate diagonalization, cuboctahedron
PACS: 75.10.Jm, 75.50.Xx, 75.40.Mg, 75.50.Ee
Comments: Figs. 7, Refs. 35, Tabs. 0

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