期刊
PHYSICAL REVIEW B
卷 72, 期 21, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.72.212405
关键词
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We parametrize the adiabatic magnetic energy of generalized classical spins for the important special case of zero spin-orbit coupling and no applied external field. The expansion classifies the classical Heisenberg model as a first order approximation to the energy; extensions of the Heisenberg model in literature are shown to be of second order in the classical limit of our parametrization. The expressions for a third-order approximation to the magnetic energy are derived.
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