六角密排格子ISING(S=1)反铁磁体的零温相图

THE OK PHASE DIAGRAM OF THE ISING (S=1) ANTIFERROMAGNET OF THE HEXAGONAL-CLOSE-PACKED LATTICE

本文利用文献[1]所发展的量子多体方法,变S=1的Ising体系为粒子数不守恒的费米体系,严格地求得了具有近邻和次近邻相互作用的六角密排Ising反铁磁体在外场下的基态能量和完整的零温相图。

The Ising S=1 systems are transferred to a Fermion system in which the total number of particles is not a constant by the quantum many-body method in the reference[1]. we obtained rigorously the ground state energy of the antiferromagnetics of Ising S=1 hexagonal-close-packed lattice with nearest neighbors and next nearest neighbors interaction in an arbitrary magnetic field, and also the phase equilibrium diagram at T=OK.