کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
975077 933015 2008 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase diagram of an Ising model with competitive interactions on a Husimi tree and its disordered counterpart
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
Phase diagram of an Ising model with competitive interactions on a Husimi tree and its disordered counterpart
چکیده انگلیسی
We consider an Ising competitive model defined over a triangular Husimi tree where loops, responsible for an explicit frustration, are even allowed. We first analyze the phase diagram of the model with fixed couplings in which a “gas of noninteracting dimers (or spin liquid) - ferro or antiferromagnetic ordered state” zero temperature transition is recognized in the frustrated regions. Then we introduce the disorder for studying the spin glass version of the model: the triangular ±J model. We find out that, for any finite value of the averaged couplings, the model exhibits always a finite temperature phase transition even in the frustrated regions, where the transition turns out to be a glassy transition. The analysis of the random model is done by applying a recently proposed method which allows us to derive the critical surface of a random model through a mapping with a corresponding nonrandom model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 387, Issue 12, 1 May 2008, Pages 2777-2792
نویسندگان
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