Phase Transition and Dynamic Susceptibility of the Anharmonic Oscillator System : An Effective Analysis of Double Morse Potential Based on the Unified Oscillator Model

概要

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An effective analysis for the static and the dynamic properties of an assembly of classical anharmonic oscillators moving in the double Morse potential (DMP) is made in the framework of the molecular field approximation and the linear response theory. By using the effective (trial) potential V_0(x)=Ax^4+Bx^2 with the temperature-dependent coefficients A and B, some characteristic effects of the higher anharmonicities in DMP are quantitatively considered. The present method offers an extension of the self-consistent Einstein theory, which enables us to make discussions on the static and the dynamic properties of the system from the unified mechanical point of view whether the relevant potential is of single- or of double-minimum.
社団法人日本物理学会の論文
1994-10-15