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Scattering Theory of Current-Induced Forces in Mesoscopic Systems

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Zitation

Bode, N., Viola-Kusminskiy, S., Egger, R., & von Oppen, F. (2011). Scattering Theory of Current-Induced Forces in Mesoscopic Systems. PHYSICAL REVIEW LETTERS, 107(3): 036804. doi:10.1103/PhysRevLett.107.036804.


Zitierlink: http://hdl.handle.net/21.11116/0000-0001-DF48-4
Zusammenfassung
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.