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arXiv · 1310.4961

Phase diagram of spin-$\frac 12$ quantum Heisenberg $J_1-J_2$ antiferromagnet on the body-centered-cubic lattice in random phase approximation

Milan R. Pantic·Darko V. Kapor·Slobodan M. Radosevic·Petar M. Mali
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Abstract

Magnetic properties of spin $\frac 12$ $J_1-J_2$ 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 $p=J_2/J_1$ are obtained in both stripe and Néel phase. The analysis of ground state sublattice magnetization and phase diagram indicates the critical end point at $J_2/J_1 =0.714$, in agreement with previous studies.

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Milan R. Pantic, Darko V. Kapor, Slobodan M. Radosevic, Petar M. Mali. 2013-10-18. Phase diagram of spin-$\frac 12$ quantum Heisenberg $J_1-J_2$ antiferromagnet on the body-centered-cubic lattice in random phase approximation. https://doi.org/10.1016/j.ssc.2013.12.007

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