Yangian symmetry in molecule {V6} and four-spin Heisenberg model

Xu-Biao Peng, Cheng-Ming Bai, Mo-Lin Ge

The symmetry operator $Q=Y^2$ is introduced to re-describe the Heisenberg spin triangles in the \{V6\} molecule, where $\mathbf{Y}$ stands for the Yangian operator which can be vie…