Quantum paramagnetic states in the spin-1/2 distorted honeycomb-lattice Heisenberg antiferromagnet -- application to Cu${}_2$(pymca)${}_3$(ClO${}_4$)

Tokuro Shimokawa, Ken'ichi Takano, Zentaro Honda +2

We investigate the ground-state phase diagram of a spin-1/2 honeycomb-lattice antiferromagnetic (AF) Heisenberg model with three exchange interactions, $J_{\mathrm{A}}$, $J_{\mathrm{B}}$, an…