Spin-Wave Analysis for Kagome-Triangular Spin System and Coupled Spin Tubes: Low-Energy Excitation for the Cuboc Order

The coupled spin tube system, which is equivalent to a stacked Kagome-triangular spin system, exhibits the cuboc order -- a non-coplanar spin order with a twelve-sublattice structure accompanying spontaneous breaking of the translational symmetry -- in the Kagome-triangular plane. On the basis of th...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2017-11, Vol.86 (11), p.114701
Main Authors: Ochiai, Masahiro, Seki, Kouichi, Okunishi, Kouichi
Format: Article
Language:English
Subjects:
Energy
Geometry
Lattice theory
Spin structure
Symmetry
Tubes
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Summary:The coupled spin tube system, which is equivalent to a stacked Kagome-triangular spin system, exhibits the cuboc order -- a non-coplanar spin order with a twelve-sublattice structure accompanying spontaneous breaking of the translational symmetry -- in the Kagome-triangular plane. On the basis of the spin-wave theory, we analyze spin-wave excitations of the planar Kagome-triangular spin system, where the geometric phase characteristic to the cuboc spin structure emerges. We further investigate spin-wave excitations and dynamical spin structure factors for the coupled spin tubes, assuming the staggered cuboc order.
ISSN:0031-9015
1347-4073
DOI:10.7566/JPSJ.86.114701