Key points are not available for this paper at this time.
Renormalization-group equations for the uniaxial commensurate-incommensurate (C-IC) transition in two dimensions are derived. The soliton density is a nonanalytic function of the misfit parameter even at high temperatures where only a floating phase (i. e. , algebraic correlations with exponent) is possible. The singularity at 0 is -T_^-3, where T is temperature. In the (T, ) plane the floating phase is singular therefore on all lines where its density (relative to the substrate) is rational; this is the remnant of the low-temperature devil's staircase. At low temperatures a matching procedure with the fermion approach is obtained.
Horovitz et al. (Thu,) studied this question.