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Field-dependent specific-heat of the pure and diluted 4f electron system Yb4As3 |
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| Authors: | R Matysiak G Kamieniarz P Gegenwart A Ochiai |
| Institution: | a Institute of Engineering and Computer Education, University of Zielona Góra, ul. prof. Z. Szafrana 4, 65-516 Zielona Góra, Poland b Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany c Computational Physics Division, Institute of Physics, A. Mickiewicz University, ul. Umultowska 85, 61-614 Poznań, Poland d Max-Planck-Institute for the Chemical Physics of Solids, 01187 Dresden, Germany e Center for Low Temperature Science, Tohoku University, Sendai 980-8578, Japan |
| Abstract: | The experimental field-dependent specific heat of the polydomain pure Yb4As3 and diluted (Yb1−xLux)4As3 (x = 0.01, 0.03) systems is presented and compared with that calculated by the numerical quantum transfer-matrix method. The simulations have been performed using the S = 1/2 antiferromagnetic Heisenberg model with the transverse staggered field (appearing as a result of the antisymmetric Dzyaloshinskii-Moriya interaction) and a uniform magnetic field perpendicular to the staggered field. In the model calculations the fixed microscopic parameters have been taken and the impurity distribution has been considered. A significant improvement with respect to the previous results is shown. |
| Keywords: | Numerical simulation Heisenberg model Dzyaloshinskii-Moriya interaction |
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