Crossover behavior in three-dimensional dilute spin systems.
作者： Pasquale Calabrese , Pietro Parruccini , Andrea Pelissetto , Ettore Vicari
DOI: 10.1103/PHYSREVE.69.036120
关键词: Crossover 、 Condensed matter physics 、 Ising model 、 Physics 、 Phase (matter) 、 Quartic function 、 Magnetic susceptibility 、 Spin (physics) 、 Amplitude
摘要: We study the crossover behaviors that can be observed in high-temperature phase of three-dimensional dilute spin systems, using a field-theoretical approach. In particular, for randomly Ising systems we consider Gaussian-to-random and pure-Ising-to-random crossover, determining corresponding functions magnetic susceptibility correlation length. Moreover, physically interesting cases Ising, XY, Heisenberg estimate several universal ratios scaling-correction amplitudes entering Wegner expansion susceptibility, length, zero-momentum quartic couplings.
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