Abstract
As a continuation of our previously published work, we use the Nelsonʼs method to study the effect of the magnetic field on the temperature-, frequency-, and momentum-dependent response function and dynamic correlation function in the Ising-type systems with relaxational dynamics. The scaling function is given within the renormalization group formalism at one-loop order for nonzero field. We show how the typical two-peak structure of the real part of response function changes with magnetic field. We discuss the deviations of the correlation function from the Gaussian expression. The Fisher–Langer maximum is also considered. • We study the effect of magnetic field on dynamic response and correlation function. • Crossover in magnetic dispersion factor from two peaks to a single peak is shown. • We discuss the deviations of the correlation function from the Gaussian expression. • The Fisher–Langer maximum in the correlation function is shifted.
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