Sun, 27 Jul 2008 08:03:14 BST CiteULike: dchen's Reinke http://www.citeulike.org/user/dchen/author/Reinke CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/2563121 <i>Physical Review Letters, Vol. 98, No. 3. (2007)</i><br /><br />The elastic properties of fcc crystals consisting of charge stabilized colloidal particles are determined from real space imaging experiments using confocal microscopy. The normal modes and the force constants of the crystal are obtained from the fluctuations of the particles around their lattice sites using the equipartition theorem. We show that the Cauchy relation is not fulfilled and that only noncentral many-body forces can account for the elastic properties. Noncentral Forces in Crystals of Charged Colloids D Reinke H Stark HH von Grünberg Andrew Schofield G Maret U Gasser doi:10.1103/PhysRevLett.98.038301 Physical Review Letters, Vol. 98, No. 3. (2007) 2008-03-19T17:11:08-00:00 2007 Physical Review Letters 98 3 APS 2007 charge colloids