Generalized hole-particle transformations and spin reflection positivity in multiorbital systems
Year: 2002
Type: article
Abstract: We propose a scheme combining spin reflection positivity and generalized hole-particle and orbital transformations to characterize the symmetry properties of the ground state for some correlated electron models on bipartite lattices. In particular, we rigorously determine at half-filling and for different regions of the parameter space the spin, orbital, and $\ensuremath{\eta}$ pairing pseudospin of the ground state of generalized two-orbital Hubbard models that include the Hund's rule coupling.
Authors: Mario Cuoco, Canio Noce
Institution: University of Salerno
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2054961040