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Kink plateau dynamics in finite-size lubricant chains (Articolo in rivista)
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- Kink plateau dynamics in finite-size lubricant chains (Articolo in rivista) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
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Cesaratto, M; Manini, N; Vanossi, A; Tosatti, E; Santoro, GE (2007)
Kink plateau dynamics in finite-size lubricant chains
in Surface science
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- Cesaratto, M; Manini, N; Vanossi, A; Tosatti, E; Santoro, GE (literal)
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- SISSA, I-34014 Trieste, Italy; Univ Milan, Dept Phys, I-20133 Milan, Italy; Univ Modena & Reggio Emilia, Dept Phys, I-41100 Modena, Italy; Univ Modena & Reggio Emilia, CNR, INFM, Natl Res Ctr S3, I-41100 Modena, Italy; Democritos Natl Simulat Ctr, CNR, INFM, I-34014 Trieste, Italy; Int Ctr Theoret Phys, I-34014 Trieste, Italy (literal)
- Titolo
- Kink plateau dynamics in finite-size lubricant chains (literal)
- Abstract
- We extend the study of velocity quantization phenomena recently found in the classical motion of an idealized ID model solid lubricant - consisting of a harmonic chain interposed between two periodic sliding potentials [A. Vanossi, M. Manini, G. Divitini, G.E. Santoro, E. Tosatti, Phys. Rev. Lett. 97 (2006) 056101]. This quantization is due to one slider rigidly dragging the commensurate lattice of kinks that the chain forms with the other slider. In this follow-up work we consider finite-size chains rather than infinite chains. The finite-size (i) permits the development of robust velocity plateaus as a function of the lubricant stiffness, and (ii) allows an overall chain length re-adjustment which spontaneously promotes single-particle periodic oscillations. These periodic oscillations replace the quasiperiodic motion produced by general incommensurate periods of the sliders and the lubricant in the infinite-size model. Possible consequences of these results for some real systems are discussed. (c) 2007 Elsevier B.V. All rights reserved. (literal)
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