The Heisenberg antiferromagnet: an explicitly rotational invariant formulation
da Providencia, J. · Providencia, C. · Brajczewska, M. · Providencia Jr, J. da
Original · EN
A simple derivation of an explicitly rotational invariant Lagrangian describing the dynamics of an antiferromagnetic spin system is presented. The scope of the derived Lagrangian is analysed in the context of schematic models. It is shown that the Lagrangian describes the behaviour of spin systems from the anti-ferromagnetic to the ferromagnetic regimes.
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