0 Spin - Peierls instability in the spin - 12 transverse XX chain with Dzyaloshinskii - Moriya interaction
نویسنده
چکیده
We calculate exactly the density of magnon states of the regularly alternating spin2 XX chain with Dzyaloshinskii-Moriya interaction. The obtained result permit us to examine the stability of the chain with respect to spin-Peierls dimerization. We found that depending on the dependences of Dzyaloshinskii-Moriya interaction on distortion amplitude it may act either in favour of the dimerization or against the dimerization. PACS numbers: 75.10.-b
منابع مشابه
Spin-Peierls instability in a quantum spin chain with Dzyaloshinskii-Moriya interaction
We analysed the ground state energy of some dimerized spin1 2 transverse XX and Heisenberg chains with Dzyaloshinskii-Moriya (DM) interaction to study the influence of the latter interaction on the spinPeierls instability. We found that DM interaction may act either in favour of the dimerization or against it. The actual result depends on the dependence of DM interaction on the distortion ampli...
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Since the discovery of the inorganic spin-Peierls compound CuGeO3 the interest in the properties of spin-Peierls systems considerably increased [1]. The models that can be examined exactly play an important role in clarifying the generic features of such systems. An example of such a model is the spin1 2 XX chain that was studied in several papers [2, 3, 4] (note, however, that in the nonadiaba...
متن کاملThermodynamic properties of spin-12 transverse XY chain with Dzyaloshinskii-Moriya interaction: Exact solution for correlated Lorentzian disorder
We extend the consideration of the spin2 transverse XY chain with correlated Lorentzian disorder (Phys. Rev. B 55, 14298 (1997)) for the case of additional Dzyaloshinskii-Moriya interspin interaction. It is shown how the averaged density of states can be calculated exactly. Results are presented for the density of states and the transverse magnetization. PACS numbers: 75.10.-b
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