Magnetic Properties of Transverse Ising Model under a Time Oscillating Longitudinal Field  

作　　者：石晓玲 王莉 魏国柱 

机构地区：[1]College of Sciences,Liaoning University of Petroleum and Chemical Technology [2]College of Sciences,Northeastern University [3]International Center for Material Physics,Academia Sinica

出　　处：《Communications in Theoretical Physics》2011年第4期715-718,共4页理论物理通讯（英文版）

摘　　要：A transverse Ising spin system, in the presence of time-dependent longitudinal field, is studied by the effective-field theory （EFT）. The effective-field equations of motion of the average magnetization are given for the simple cubic lattice （Z ---- 6） and the honeycomb lattice （Z = 3）. The Liapunov exponent A is calculated for discussing the stability of the magnetization and it is used to determine the phase boundary. The dynamic phase transition diagrams in ho/ZJ - F/ZJ plane and in ho/ZJ - T/ZJ plane have been drawn, and there is no dynamical tricritical point on the dynamic phase transition boundary. The effect of the thermal fluctuations upon the dynamic phase boundary has been discussed.

关 键 词：effective-field theory transverse Ising model dynamic phase transition 

分 类 号：O469[理学—凝聚态物理]