Theory of optically forbidden d–d transitions in strongly correlated crystals

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Erscheinungsjahr:
2010
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Text
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  • A general multiband formulation of the linear and nonlinear optical response functions for realistic models of correlated crystals is presented. Dipole-forbidden d-d optical transitions originate from vertex functions, which we consider assuming the locality of an irreducible four-leg vertex. The unified formulation for second- and third-order response functions in terms of the three-leg vertex is suitable for practical calculations in solids. We illustrate the general approach by consideration of intra-atomic spin-flip contributions, with an energy of 2 J, where J is a Hund exchange, in the simplest two-orbital model. © 2010 IOP Publishing Ltd.
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  • info:eu-repo/semantics/closedAccess
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Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/2af4be01-757b-4f79-b8fd-f28543eadcb6