Quantum phase transitions in trimerized zig-zag spin ladders

H. D. Rosales, D. C. Cabra, M. D. Grynberg +2

We analyze the effects of a trimerized modulation in a quantum spin $S=\frac{1}{2}$ zig-zag ladder at the magnetization plateau $M=1/3$. Such periodicity is argued to be stemmed from l…