کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10481941 933248 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Random field effects on the anisotropic quantum Heisenberg model with Gaussian random magnetic field distribution
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
Random field effects on the anisotropic quantum Heisenberg model with Gaussian random magnetic field distribution
چکیده انگلیسی
The effect of a zero-centered Gaussian random magnetic field distribution on the phase transition properties of the anisotropic quantum Heisenberg model has been investigated on a honeycomb lattice within the framework of effective field theory (EFT) for a two-spin cluster (which is abbreviated as EFT-2). Particular attention has been devoted to investigation of the effect of the anisotropy in the exchange interaction on a system with Gaussian random magnetic field distribution. The variation of the critical temperature with the randomness parameter (i.e., the width of the distribution) has been obtained for several anisotropy parameters. Critical Gaussian distribution width values, which make the critical temperature zero, have been obtained. Moreover, it has been concluded that all critical temperatures are of second order, and that reentrant behavior does not exist in the phase diagrams.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 392, Issue 19, 1 October 2013, Pages 4380-4387
نویسندگان
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