Dr . J . SchmelzerGebre Medhin, Teka2022-01-262023-11-092022-01-262023-11-091987-06http://10.90.10.223:4000/handle/123456789/29722Interest in thin films arises both from a theoretical point of view and from the wide range of applications theory can offer.en. two-Dimensional SystemsFirst Order Phase Transitions in .Two-dimensional Systems. (Adsorbed Layers)Thesis