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Magnetic response of the J1-J2 spin Hamiltonian from classical Monte
Carlo and Schwinger boson mean field theory
release_34ieuftyhvfbnhtxr3erb2vk6u
by
Zhihua Yang, Jung Hoon Kim, Jung Hoon Han
Released
as a article
.
2009
Abstract
Magnetic susceptibilities at several potential ordering wave vectors (0,0),
(\pi,0), and (\pi,\pi) are analyzed for the antiferromagnetic J1-J2 spin
Hamiltonian by classical Monte Carlo and Schwinger boson mean field theories
over the parameter range 0 \le 2J_2/J_1 \le 2. We find a nearly linear-T
behavior of the uniform susceptibility that extends up to the temperature scale
of J_1 within both calculation schemes when 2J_2/J_1 is sufficiently removed
from the critical point 2J_2/J_1=1. The window of linear temperature dependence
diminishes as the critical point is approached.
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0904.3809v1
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