Dynamics in two-leg spin ladder with a four-spin cyclic interaction

Abstract

We study two-leg Heisenberg ladder with four-spin cyclic interaction using the (dynamical) density-matrix renormalization group method. We demonstrate the dependence of the low-lying excitations in the spin wave, staggered dimer order, and scalar-chirality order structure factors on the four-spin cyclic interaction. We find that the cyclic interaction enhances spin-spin correlations with wave vector around momentum $(q_x,q_y)=(\frac{\pi }{2},0)$. Also, the presence of long-range order in the staggered dimer and scalar-chirality phases is confirmed by a $\delta$-function peak contribution of the structure factors at energy $\omega =0$.

4 pages, 4 figures

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Cited by in corpus (5)

• Discrete antiferromagnetic spin-wave excitations in the giant ferric wheel Fe18
• Quantum phase transitions in multileg spin ladders with ring exchange
• Magnetization and energy dynamics in spin ladders: Evidence of diffusion in time, frequency, position, and momentum
• Edge states of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
• Semiclassical Approach to Competing Orders in Two-leg Spin Ladder with Ring-Exchange