Spin-1/2 isotropic XY chain with Dzyaloshinskii-Moriya interaction in random lorentzian transverse field
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The exact results for thermodynamical properties of one-dimensional spin-1/2 isotropic XY model with Dzyaloshinskii-Moriya interaction in random lorentzian transverse field are obtained. This permits to discuss some approximate methods of disordered spin systems theory. The approximate scheme of examining the thermodynamics of one-dimensional spin-1/2 XXZ Heisenberg model with Dzyaloshinskii-Moriya interaction in random lorentzian field is suggested.
33 pages, Latex, 8 figures, will appear in physica status solidi (b) 200, 1 (1997)
33 pages, Latex, 8 figures, will appear in physica status solidi (b) 200, 1 (1997)