Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1999-07-06
Physics
Condensed Matter
Statistical Mechanics
17 pages
Scientific paper
10.1103/PhysRevB.62.15461
The group theory framework developed by Fukutome for a systematic analysis of the various broken symmetry types of Hartree-Fock solutions exhibiting spin structures is here extended to the general many body context using spinor-Green function formalism for describing magnetic systems. Consequences of this theory are discussed for examining the magnetism of itinerant electrons in nanometric systems of current interest as well as bulk systems where a vector spin-density form is required, by specializing our work to spin-density-functional formalism. We also formulate the linear response theory for such a system and compare and contrast them with the recent results obtained for localized electron systems. The various phenomenological treatments of itinerant magnetic systems are here unified in this group-theoretical description.
Mochena Mogus
Rajagopal A. K.
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