Physics – Condensed Matter
Scientific paper
2002-12-21
Nanotechnology 14, 299 (2003)
Physics
Condensed Matter
10 pages and 6 figures. accepted to Nanotechnology
Scientific paper
10.1088/0957-4484/14/2/338
We demonstrate a theoretical analysis concerning the geometrical structures and electrical conduction of infinite monatomic gold and aluminum wires in the process of their elongation, based on first-principles molecular-dynamics simulations using the real-space finite-difference method. Our study predicts that the single-row gold wire ruptures up to form a dimer coupling structure when the average interatomic distance increases up to more than 3.0 A, and that the wire is conductive before breaking but changes to an insulator at the rupturing point. In the case of the alumi-num wire, it exhibits a magnetic ordering due to the spin polarization, and even when stretched up to the average interatomic distance of 3.5 A, a dimerization does not oc-cur and the wire keeps a metallic nature.
Egami Yoshiyuki
Hirose Kikuji
Ono Tomoya
Yamasaki Hideki
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