期刊
PHYSICAL REVIEW B
卷 79, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.113106
关键词
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资金
- JSPS [20654034]
- MEXT [220029004]
- Novel States of Matter Induced by Frustration [20046002]
- Grants-in-Aid for Scientific Research [20654034] Funding Source: KAKEN
We study the 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)) = (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.
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