title: Comment on "Elastic constants from microscopic strain fluctuations".
abstract: Sengupta [Phys. Rev. E 61, 1072 (2000)] presented an elegant and simple finite-size scaling method for the calculation of elastic constants and their corresponding correlation lengths, which is suitable for many finite discrete systems considered through simulations or experiments. We take into account a mathematical finite-size effect that was neglected by the authors in order to propose a more accurate method. Consequences on the authors' results are also discussed.
authors.affiliation: Laboratoire de Spectrométrie Physique, CNRS-UMR 5588, Université Grenoble I, St. Martin d'Hères Cedex, France. gcoupier@spectro.ujf-grenoble.fr
authors.forename: Gwennou
authors.initials: G
authors.lastname: Coupier
authors.forename: Claudine
authors.initials: C
authors.lastname: Guthmann
authors.forename: Michel
authors.initials: M
authors.lastname: Saint Jean