期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.036804
关键词
-
资金
- DFG [SPP 1459, SFB TR/12, SFB 658]
We develop a scattering theory of current-induced forces exerted by the conduction electrons of a general mesoscopic conductor on slow mechanical degrees of freedom. Our theory describes the current-induced forces both in and out of equilibrium in terms of the scattering matrix of the phase-coherent conductor. Under general nonequilibrium conditions, the resulting mechanical Langevin dynamics is subject to both nonconservative and velocity-dependent Lorentz-like forces, in addition to (possibly negative) friction. We illustrate our results with a two-mode model inspired by hydrogen molecules in a break junction which exhibits limit-cycle dynamics of the mechanical modes.
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