کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10729227 1038240 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Inverse freezing in the Hopfield fermionic Ising spin glass with a transverse magnetic field
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Inverse freezing in the Hopfield fermionic Ising spin glass with a transverse magnetic field
چکیده انگلیسی
The Hopfield fermionic Ising spin glass (HFISG) model in the presence of a magnetic transverse field Γ is used to study the inverse freezing transition. The mean field solution of this model allows introducing a parameter a that controls the frustration level. Particularly, in the present fermionic formalism, the chemical potential μ and the Γ provide a magnetic dilution and quantum spin flip mechanism, respectively. Within the one step replica symmetry solution and the static approximation, the results show that the reentrant transition between the spin glass and the paramagnetic phases, which is related to the inverse freezing for a certain range of μ, is gradually suppressed when the level of frustration a is decreased. Nevertheless, the quantum fluctuations caused by Γ can destroy this inverse freezing for any value of a.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 375, Issue 3, 17 January 2011, Pages 689-697
نویسندگان
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