Susceptibility and Specific Heat in the Glass-Like Phase : Cumulant Expansion to the Random Bond Ising Model
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概要
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A random Ising magnet of a mixture of ferro- and anti-ferromagnetic interactions J_A and J_B , is treated by a method of modified cumulant expansion by regarding the effective field and its square as random variables. Thermodynamic properties of the glass-like phase (GLP), which is characterized by the non-zero value of the square of the magnetization at site i, are discussed. It is shown that the susceptibility and the specific heat have cusps at the transition temperature T_G between the glass-like phase and the paramagnetic phase. Relations among the spin glass state by Edwards and Anderson, the random ordered phase by Ueno and Oguchi, and the glass-like phase by Matsubara and Sakata are discussed.
- 理論物理学刊行会の論文
- 1977-08-25
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関連論文
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