Phase diagram of spin- 12 quantum Heisenberg J1-J2 antiferromagnet on the body-centered-cubic lattice in random phase approximation
Abstract
Magnetic properties of spin 12 J1-J2 Heisenberg antiferromagnet on body centered cubic lattice are investigated. By using two-time temperature Green's functions, sublattice magnetization and critical temperature depending on the frustration ratio p=J2/J1 are obtained in both stripe and N\'eel phase. The analysis of ground state sublattice magnetization and phase diagram indicates the critical end point at J2/J1 =0.714, in agreement with previous studies.
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