Topologically nontrivial $1/3$-magnetization plateau state in a spin-1/2 trimer chain

Y. Y. Han, B. C. Yu, Z. Du +8

Topologically nontrivial Haldane phase is theoretically proposed to be realized in the 1/3-magnetization ($M$) plateau of spin-1/2 trimer systems. However, the spin excitation gap,…