Quantum Monte Carlo study of topological phases on a spin analogue of Benalcazar–Bernevig–Hughes model
Quantum Monte Carlo study of topological phases on a spin analogue of Benalcazar–Bernevig–Hughes model
We study the higher-order topological spin phases based on a spin analogue of Benalcazar-Bernevig-Hughes model in two dimensions using large-scale quantum Monte Carlo simulations. A continuous Néel-valence bond solid quantum phase transition is revealed by tuning the ratio between dimerized spin couplings, namely, the weak and strong exchange couplings. Through …