三态随机能量模型。

IF 2.2 3区物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS

Physical Review E Pub Date : 2025-02-01 DOI:10.1103/PhysRevE.111.024129

Sumedha, Matteo Marsili

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引用次数: 0

摘要

我们引入了带有晶体场的自旋-1版本的随机能量模型。晶体场控制系统中0个自旋的密度。我们在微正则系综中求解该模型。该模型在有限温度下对所有强度的晶体场都具有自旋玻璃转变。通过引入磁场，得到了模型的de Almeida-Thouless线。在外场存在的情况下，自旋玻璃跃迁仍然存在。我们还发现，在高正晶体场强下，磁化表现出非单调行为。零磁场比热和磁化率也表现出超过晶体场阈值的尖峰。

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Three-state random energy model.

We introduce a spin-1 version of the random energy model with a crystal field. The crystal field controls the density of 0 spins in the system. We solve the model in the microcanonincal ensemble. The model has a spin-glass transition at a finite temperature for all strengths of the crystal field. By introducing the magnetic field we also obtain the de Almeida-Thouless line for the model. The spin-glass transition persists in the presence of an external field. We also find that the magnetization shows nonmonotonic behavior for high positive crystal field strengths. The zero magnetic field specific heat and magnetic susceptibility also exhibit a cusp beyond a threshold value of the crystal field.

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来源期刊

Physical Review E PHYSICS, FLUIDS & PLASMASPHYSICS, MATHEMAT-PHYSICS, MATHEMATICAL

CiteScore

4.50

自引率

16.70%

发文量

2110

期刊介绍： Physical Review E (PRE), broad and interdisciplinary in scope, focuses on collective phenomena of many-body systems, with statistical physics and nonlinear dynamics as the central themes of the journal. Physical Review E publishes recent developments in biological and soft matter physics including granular materials, colloids, complex fluids, liquid crystals, and polymers. The journal covers fluid dynamics and plasma physics and includes sections on computational and interdisciplinary physics, for example, complex networks.