Absence of a classical long-range order in $S=1/2$ Heisenberg antiferromagnet on triangular lattice

Nobuo Suzuki, Fumitaka Matsubara, Sumiyoshi Fujiki +1

We study the quantum phase transition of an $S=1/2$ anisotropic $\alpha$ $(\equiv J_z/J_{xy})$ Heisenberg antiferromagnet on a triangular lattice. We calculate the sublattice magnetizat…