Recent experiments on Au break junctions [Phys. Rev. Lett. 88 (2002) 216803] have characterized the nonlinear conductance of stretched short Au nanowires. They reveal in the voltage range 10-20 meV the signatures of dissipation effects, likely due to phonons in the nanowire, reducing the conductance below the quantized value of 2e(2)/h. We present here a theory, based on a model tight-binding Hamiltonian and on non-equilibrium Green's function techniques, which accounts for the main features of the experiment. The theory helps in revealing details of the experiment which need to be addressed with a more realistic, less idealized, theoretical framework.
|Titolo:||Theory of phonon dissipation in the conduction of stressed Au nanowires|
|Autori:||Stella L; Santoro GE; Fabrizio M; Tosatti E|
|Data di pubblicazione:||2004|
|Digital Object Identifier (DOI):||10.1016/j.susc.2004.06.121|
|Appare nelle tipologie:||1.1 Journal article|