G. Barbero et S. Faetti, PHENOMENOLOGICAL APPROACH TO THE PROBLEM OF THE K-13 SURFACELIKE ELASTIC TERM IN THE FREE-ENERGY OF A NEMATIC LIQUID-CRYSTAL - COMMENT, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 54(5), 1996, pp. 5866-5867
In a recent paper [Phys. Rev. E 48, 1254 (1993)], an alternative proce
dure is proposed for obtaining the nematic director field that minimiz
es the total free energy of a nematic liquid crystal. In this Comment
we show that this solution does not correspond to a minimum of the fre
e energy.