Valence-Bond Solid phases in the spin-$1/2$ Kekule-Heisenberg model

Fatemeh Mirmojarabian, Saeed S. Jahromi, Jahanfar Abouie

We map out the ground state phase diagram of the isotropic Kekule'-Kitaev model on the honeycomb lattice in the presence of the Heisenberg exchange couplings. Our study relies on l…