Tensor structure of the electrostatic interaction Hamiltonian in the Hubbard representation, and its application to magnetically ordered crystals
А. А. ЛогиновPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRV. A. PopovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
ABI
Abstract
A representation of the electrostatic interaction Hamiltonian is obtained which is analogous to the Hubbard representation, but is explicitly invariant with respect to the spin rotations. Using this representation, we investigate the equivalent Hamiltonian for spin excitations, and obtain the temperature dependences of the site spin moment and effective exciton Hamiltonian.
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