Ferromagnetism by the generator coordinate Method

C. Fiolhais, J.Pinheiro da Providência and J.N. Urbano

Physica A: Statistical Mechanics and its Applications, 1979, vol. 99, issue 1, 251-267

Abstract: The Generator Coordinate Method is applied to construct a boson representation of the energy of a S = 12 ferromagnet near its ground-state. Considering one generator coordinate per lattice site the resulting representation coincides with the one obtained starting from the Dirac-Heisenberg Hamiltonian and using the Holstein-Primakoff transformation, expanded to all orders, inside the physical subspace. On the other hand, introducing generator coordinates to describe only the long-wavelength modes, we obtain a representation which can be consistently expanded until any desired order of approximation.

Date: 1979
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:99:y:1979:i:1:p:251-267

DOI: 10.1016/0378-4371(79)90133-X

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