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

References in corpus (4)

• One- and Two-Triplon Spectra of a Cuprate Ladder
• Phase Diagram of a Spin Ladder with Cyclic Four Spin Exchange
• Magnetic Phase Diagram of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
• Dynamics in One-Dimensional Spin Systems - Density-Matrix Renormalization Group Study

Cited by in corpus (1)

• Edge states of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange