Elastic fluctuations as observed in a confocal slice
  Recent confocal experiments on colloidal solids motivate a fuller study of the projection of three-dimensional fluctuations onto a two-dimensional confocal slice. We show that the effective theory of a projected crystal displays several exceptional features, such as non-standard exponents in the dispersion relations. We provide analytic expressions for the effective two-dimensional elastic properties which allow one to work back from sliced experimental observations to three-dimensional elastic constants. 
Claire A. Lemarchand, A. C. Maggs, and Michael Schindler
cond-mat.stat-mech cond-mat.soft physics.data-an