Tricritical and Critical Exponents in Microcanonical Ensemble of Systems with Long-Range Interactions  

作　　者：Liang-Sheng Li 李粮生(Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854, China)

机构地区：Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854, China

出　　处：《Communications in Theoretical Physics》2016年第12期638-642,共5页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.11104032

摘　　要：We explore the tricritical points and the critical lines of both Blume Emery Griffiths and Ising model within long-range interactions in the microcanonical ensemble.For K = Kmtp,the tricritical exponents take the valuesβ = 1/4,1 =γ^-≠γ^+ = 1/2 and 0 =α^-≠α^+ =-1/2,which disagree with classical(mean ffeld) values.When K > Kmtp,the phase transition becomes second order and the critical exponents have classical values except close to the canonical tricritical parameters(Kctp),where the values of the critical expoents become β = 1/2,1 = γ^-≠γ^+= 2and 0 =α^-≠α^+ = 1.

关 键 词：long-range interation critical exponent microcanonical ensemble 

分 类 号：O513[理学—低温物理]