Spin chirality driven by the Dzyaloshinskii–Moriya interaction in one-dimensional antiferromagnetic chain

Dzyaloshinskii–Moriya (DM) interactions cause many interesting physical features, such as topologically nontrivial magnetic skyrmions and chiral domain walls. These interactions become more pronounced in low-dimensional systems. We investigated a one-dimensional Heisenberg spin-1/2 chain with an asy...

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Bibliographic Details
Published in:AIP advances 2023-04, Vol.13 (4), p.045103-045103-5
Main Authors: Guo, Xing, Li, Yaojin, Yao, Zimeng, Jia, Chenglong, Zhang, Lan
Format: Article
Language:English
Subjects:
Antiferromagnetism
Chains
Chirality
Domain walls
Energy spectra
Hypothetical particles
Particle theory
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Summary:Dzyaloshinskii–Moriya (DM) interactions cause many interesting physical features, such as topologically nontrivial magnetic skyrmions and chiral domain walls. These interactions become more pronounced in low-dimensional systems. We investigated a one-dimensional Heisenberg spin-1/2 chain with an asymmetric DM interaction. The results show that, upon applying a nonzero DM interaction, the Néel ground state transitions to a spin chiral phase. Moreover, using the mean-field approximation, we obtain the dispersion of the energy spectrum, from which the z-axis spin chirality is calculated as a function of the strength of the DM interaction for low-lying excitations. The results indicate that the DM interaction facilitates chirality for Dz ≤ J and induces a spin-gapped chiral state.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0146777