| Autor: |
Bode N; Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany., Kusminskiy SV, Egger R, von Oppen F |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2011 Jul 15; Vol. 107 (3), pp. 036804. Date of Electronic Publication: 2011 Jul 11. |
| DOI: |
10.1103/PhysRevLett.107.036804 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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