Thermodynamic First Order Transition and Inverse Freezing in a 3D Spin Glass

被引：30
|
作者：
Paoluzzi, M. [1 ,2 ]
Leuzzi, L. [1 ,3 ]
Crisanti, A. [3 ]
机构：
[1] UOS Roma, CNR, IPCF, I-00185 Rome, Italy
[2] Univ Roma Tre, Dipartimento Fis, I-00146 Rome, Italy
[3] Univ Sapienza, Dipartimento Fis, I-00185 Rome, Italy
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 12期
关键词：
BLUME-CAPEL MODEL; PHASE-SEPARATION; ISING-MODEL; BEHAVIOR; METHYLCELLULOSE; DIAGRAM; LATTICE;
D O I：
10.1103/PhysRevLett.104.120602
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a numerical study of the random Blume-Capel model in three dimensions. The phase diagram is characterized by spin-glass-paramagnet phase transitions of both first and second order in the thermodynamic sense. Numerical simulations are performed using the exchange Monte Carlo algorithm, providing clear evidence for inverse freezing. The main features at criticality and in the phase coexistence region are investigated. We are not privy to other 3D short-range systems with quenched disorder undergoing inverse freezing.
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页数：4
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