Virginia Tech. Physics DepartmentBowen, Samuel P.Lady, S. C.2015-05-212015-05-211984Bowen, S. P., Lady, S. C. (1984). The role of coulomb interactions in valence transition: Falicov_Kimball model. Journal of Applied Physics, 55(6), 1925-1927. doi: 10.1063/1.3335200021-8979http://hdl.handle.net/10919/52394A nonperturbative method of Green function calculation is applied to the Falicov_Kimball model Hamiltonian. In an approximation to first order in the hopping matrix elements, self_consistent solutions for several thermal averages and correlation functions do not show abrupt phase changes as a function of temperature. This treatment suggests that the Coulomb correlation by itself is not the key ingredient to understanding valence transitions.4 pagesapplication/pdfen-USIn CopyrightCorrelation functionsGreen's function methodsNonperturbative techniquesPhase transitionsThe role of coulomb interactions in valence transition: Falicov_Kimball modelArticle - Refereedhttp://scitation.aip.org/content/aip/journal/jap/55/6/10.1063/1.333520Journal of Applied Physicshttps://doi.org/10.1063/1.333520