Critical behaviour at the displacive limit of structural phase transitions

摘要: For a special critical point at zero temperature,Tc=0, which is called the displacive limit of classical or quantum-mechanical model showing phase transitions, we derive set static exponents in large-n limit. Due to zero-point motions and quantum fluctuations low temperatures, are different from those model. Moreover, report results on scaling functions, corrections scaling, logarithmic factors appear ford=2 case ford=3 case. Zero-point cause decrease temperature with respect classicalTc, implies difference between However, finite temperatures found both cases ford>2, while still occur atTc=0 for 0