paper

Surface critical behavior in fixed dimensions : Nonanalyticity of critical surface enhancement and massive field theory approach

arXiv:cond-mat/9409064 · doi:10.1103/PhysRevLett.73.3431

Abstract

The critical behavior of semi-infinite systems in fixed dimensions is investigated theoretically. The appropriate extension of Parisi's massive field theory approach is presented.Two-loop calculations and subsequent Padé-Borel analyses of surface critical exponents of the special and ordinary phase transitions yield estimates in reasonable agreement with recent Monte Carlo results. This includes the crossover exponent , for which we obtain the values and , considerably lower than the previous -expansion estimates.

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