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    Critical Wall Perturbations: Scaling and Renormalization Group

    Joseph Rudnick*

    David Jasnow

    • Department of Physics, University of California, Davis, California 95616

    • Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260

    • *Permanent address: Department of Physics, University of California, Santa Cruz, Cal. 95064.

    Phys. Rev. Lett. 49, 1595 – Published 29 November, 1982

    DOI: https://doi.org/10.1103/PhysRevLett.49.1595

    Abstract

    The influence at criticality of a "far" wall on the order parameter close to a "near" wall as discussed by Fisher and de Gennes is recast in a form more suitable for microscopic analysis. An argument beyond ordinary scaling is presented which yields the perturbation exponent d*=d for longitudinal perturbations and d⊥*=d−1 for transverse perturbations. These results are consistent with explicit renormalization-group computations to O(ε=4−d) which involve solution of the nonlocal equation of state.

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