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Domain wall dynamics of the spin-\(\frac{1}{2}\) Ising-like antiferromagnetic chain in presence of Dzyaloshinskii-Moriya interactions

  • Solid State and Materials
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Abstract

We consider a one-dimensional Ising-like S = \(\frac{1}{2}\) Heisenberg antiferromagnetic Hamiltonian and study the dynamics of domain wall excitations in presence of both uniform and staggered Dzyaloshinskii-Moriya interactions. We obtain dispersion relations and dynamical spin correlation functions, S x x(q, ω) using the basis of domain wall pair states. It is shown that the line shapes of S x x(q, ω) are highly asymmetric over the whole Brillouin zone such that the spectral weights mainly concentrate in the low energy side. It is observed that presence of staggered Dzyaloshinskii-Moriya interaction explains the experimental results on the Ising-like antiferromagnetic compounds CsCoCl3 and CsCoBr3 very well.

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  1. Department of Physics, Jadavpur University, 188 Raja S. C. Mallik Road, 700 032, Kolkata, India

    Asim Kumar Ghosh

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  1. Asim Kumar Ghosh
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Correspondence to Asim Kumar Ghosh.

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Ghosh, A.K. Domain wall dynamics of the spin-\(\frac{1}{2}\) Ising-like antiferromagnetic chain in presence of Dzyaloshinskii-Moriya interactions. Eur. Phys. J. B 82, 19–27 (2011). https://doi.org/10.1140/epjb/e2011-10554-y

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  • DOI: https://doi.org/10.1140/epjb/e2011-10554-y

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