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Physical review B
The hetero-epitaxial interface formed by copper deposited onto the tantalum (001) surface is studied by surface X-ray diraction and ab initio calculations. The analysis of the crystal truncation rods reveals the presence of a wetting layer of copper made of two atomic planes pseudomorphic to the tantalum substrate, with the upper most atomic planes signicantly deformed. These ndings are in total agreement with the results of density functional theory calculations. The presence of the wettingdoi:10.1103/physrevb.94.235427 fatcat:kr6qafm2gjfyhjuxg6b3d7zfya