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Thermodynamic Properties of the S=1/2 Heisenberg Chain with Staggered Dzyaloshinsky-Moriya Interaction

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arxiv cond-mat/0107561 v1 pith:FZCLZLFR submitted 2001-07-27 cond-mat.str-el cond-mat.stat-mech

Thermodynamic Properties of the S=1/2 Heisenberg Chain with Staggered Dzyaloshinsky-Moriya Interaction

classification cond-mat.str-el cond-mat.stat-mech
keywords fieldmagneticstaggeredchainheatheisenbergmagnetizationproperties
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Thermodynamic properties of the S=1/2 Heisenberg chain in transverse staggered magnetic field H^y_s and uniform magnetic field H^x 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 H^y_s/J, H^x/J=0 to 2.4. The specific heat and magnetization of the effective Hamiltonian of the Yb_4As_3 are also presented, and field induced gap formation and diverging magnetic susceptibility at low temperature are shown.

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