Thermodynamic Properties of the S=1/2 Heisenberg Chain with Staggered Dzyaloshinsky-Moriya Interaction
Abstract
Thermodynamic properties of the S=1/2 Heisenberg chain in transverse staggered magnetic field Hys and uniform magnetic field Hx perpendicular to the staggered field is studied by the finite-temperature density-matrix renormalization-group method. The uniform and staggered magnetization and specific heat are calculated from zero temperature to high temperatures up to T/J=4 under various strength of magnetic fields from Hys/J, Hx/J=0 to 2.4. The specific heat and magnetization of the effective Hamiltonian of the Yb4As3 are also presented, and field induced gap formation and diverging magnetic susceptibility at low temperature are shown.
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