Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2005-05-09
Phys. Rev. Lett. 95, 090601 (2005)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.95.090601
Thermally induced conductance jumps of metal nanowires are modeled using stochastic Ginzburg-Landau field theories. Changes in radius are predicted to occur via the nucleation of surface kinks at the wire ends, consistent with recent electron microscopy studies. The activation rate displays nontrivial dependence on nanowire length, and undergoes first- or second-order-like transitions as a function of length. The activation barriers of the most stable structures are predicted to be universal, i.e., independent of the radius of the wire, and proportional to the square root of the surface tension. The reduction of the activation barrier under strain is also determined.
Bürki J.
Stafford Charles A.
Stein Daniel L.
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