Long-range correlations in a magnet close to its critical point or in a binary alloy close to a continuous order-disorder transition can substantially enhance the effect of local perturbations. It is demonstrated using a position-space renormalization procedure that quasi-one-dimensional defects which break the symmetry of the order parameter have pronounced effects: They cause long-range critical adsorption profiles and give rise to new universal critical exponents, which are identified and calculated using field-theoretical methods.
Hanke, Andreas. “Critical Adsorption on Defects in Ising Magnets and Binary Alloys.” Physical Review Letters, vol. 84, no. 10, American Physical Society, Mar. 2000, pp. 2180–83, doi:10.1103/PhysRevLett.84.2180.
Physical Review Letters