摘要
Epitaxial Ti/Cu/(111)Si structures have been grown in ultrahigh vacuum. Mutual epitaxial growths of Ti on Cu on Ti were found even though the mismatch is as large as 15.3%. Ar + bombardment was found to induce the transformation of epitaxial hcp-Ti into epitaxial metastable fcc-Ti as well as the formation of rod-like TiO. Mechanisms for the ion beam induced phase transition are discussed.