Crossover from nonclassical to Ornstein-Zernike behavior for the order-parameter correlation function
Physical review. B, Condensed matter1989Vol. 40(7), pp. 4656–4663
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Abstract
A theoretical procedure is presented for the temperature- and wave-number-dependent order-parameter correlation function which incorporates singular scaling behavior near the critical point and the analytic Ornstein-Zernike function away from the critical point. The theory is based on an analysis of the renormalization-group equation. Near the critical point, the crossover formalism produces a Wegner correction-to-scaling term for the correlation function.
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