期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 21, 期 19, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/21/19/195304
关键词
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资金
- Engineering and Physical Sciences Research Council (UK) [EP/C006739/01]
- Office of Science and Technology through EPSRC
- Engineering and Physical Sciences Research Council [EP/C006739/1] Funding Source: researchfish
The effects of inelastic interactions between current-carrying electrons and vibrational modes of a nanoscale junction are a major limiting factor on the stability of such devices. A method for dynamical simulation of inelastic electron-ion interactions in nanoscale conductors is applied to a model system consisting of an adatom bonded to an atomic wire. It is found that the vibrational energy of such a system may decrease under bias, and furthermore that, as the bias is increased, the rate of cooling, within certain limits, will increase. This phenomenon can be understood qualitatively through low-order perturbation theory, and is due to the presence of an anti-resonance in the transmission function of the system at the Fermi level. Such current-assisted cooling may act as a stabilization mechanism, and may form the basis for a nanoscale cooling 'fan'.
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