Multiple-q states and skyrmion lattice of the triangular-lattice Heisenberg antiferromagnet under magnetic fields

Tsuyoshi Okubo; Sungki Chung; Hikaru Kawamura

doi:10.1103/physrevlett.108.017206

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arXiv · 1109.6161

Multiple-q states and skyrmion lattice of the triangular-lattice Heisenberg antiferromagnet under magnetic fields

Tsuyoshi Okubo·Sungki Chung·Hikaru Kawamura

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Abstract

Ordering of the frustrated classical Heisenberg model on the triangular-lattice with an incommensurate spiral spin structure is studied under magnetic fields by means of a mean-field analysis and a Monte Carlo simulation. Several types of multiple-q states including the "skyrmion-lattice" state is observed in addition to the standard single-q state. In contrast to the Dzyaloshinskii-Moriya interaction driven system, the present model allows both skyrmions and anti-skyrmions, together with a new thermodynamic phase where skyrmion and anti-skyrmion lattices form a domain state.

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Tsuyoshi Okubo, Sungki Chung, Hikaru Kawamura. 2011-11-17. Multiple-q states and skyrmion lattice of the triangular-lattice Heisenberg antiferromagnet under magnetic fields. https://doi.org/10.1103/physrevlett.108.017206

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