We have investigated the melting behavior of thin lead wires using molecular dynamics. We find thatin analogy with cluster meltingthe melting temperature Tm(R) of a wire with radius R is lower than that of a bulk solid Tmb by Tm(R)=Tmb-c/R. Surface melting effects, with formation of a thin skin of highly diffusive atoms at the wire surface, are observed. The diffusivity is lower over (111)-oriented faces, and higher at (110) and (100) rounded areas. The possible relevance to recent results on nonrupturing thin necks between a scanning tunnel microscope tip and a warm surface is addressed.

Premelting of thin wires / Gulseren, O.; Ercolessi, F.; Tosatti, Erio. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - 51:11(1995), pp. 7377-7380. [10.1103/PhysRevB.51.7377]

Premelting of thin wires

Tosatti, Erio
1995-01-01

Abstract

We have investigated the melting behavior of thin lead wires using molecular dynamics. We find thatin analogy with cluster meltingthe melting temperature Tm(R) of a wire with radius R is lower than that of a bulk solid Tmb by Tm(R)=Tmb-c/R. Surface melting effects, with formation of a thin skin of highly diffusive atoms at the wire surface, are observed. The diffusivity is lower over (111)-oriented faces, and higher at (110) and (100) rounded areas. The possible relevance to recent results on nonrupturing thin necks between a scanning tunnel microscope tip and a warm surface is addressed.
1995
51
11
7377
7380
https://arxiv.org/abs/cond-mat/9410012
Gulseren, O.; Ercolessi, F.; Tosatti, Erio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/30508
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