Soliton dynamics in a solid lubricant during sliding friction
| العنوان: | Soliton dynamics in a solid lubricant during sliding friction |
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| المؤلفون: | Erio Tosatti, Barbara Van Hattem, Paolo Ponzellini, Anna Vigentini, Giuseppe E. Santoro, Elena Diato, Andrea Vanossi, Tommaso Meledina, Nicola Manini |
| المصدر: | Physical review. B, Condensed matter and materials physics 89 (2014). doi:10.1103/PhysRevB.89.094301 info:cnr-pdr/source/autori:Vigentini, Anna; Van Hattem, Barbara; Diato, Elena; Ponzellini, Paolo; Meledina, Tommaso; Vanossi, Andrea; Santoro, Giuseppe; Tosatti, Erio; Manini, Nicola/titolo:Soliton dynamics in a solid lubricant during sliding friction/doi:10.1103%2FPhysRevB.89.094301/rivista:Physical review. B, Condensed matter and materials physics/anno:2014/pagina_da:/pagina_a:/intervallo_pagine:/volume:89 Physical Review B |
| بيانات النشر: | arXiv, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Materials science, Tribology, Condensed matter physics, Friction, Relative velocity, Chains, FOS: Physical sciences, Condensed Matter - Soft Condensed Matter, Condensed Matter Physics, COLLOIDAL MONOLAYERS, Electronic, Optical and Magnetic Materials, Settore FIS/03 - Fisica della Materia, Surfaces, Condensed Matter - Other Condensed Matter, Molecular dynamics, Classical mechanics, Lattice constant, Lattice (order), Slider, System parameters, Soft Condensed Matter (cond-mat.soft), Lubricant, Sliding friction, Other Condensed Matter (cond-mat.other) |
| الوصف: | Recent highly idealized model studies of lubricated nanofriction for two crystalline sliding surfaces with an interposed thin solid crystalline lubricant layer showed that the overall relative velocity of the lubricant $v_{\rm lub} / v_{\rm slider}$ depends only on the ratio of the lattice spacings, and retains a strictly constant value even when system parameters are varied within a wide range. This peculiar "quantized" dynamical locking was understood as due to the sliding-induced motion of misfit dislocations, or soliton structures. So far, the practical relevance of this concept to realistic sliding three dimensional crystals has not been demonstrated. In this work, by means of classical molecular dynamics simulations and theoretical considerations, we realize a realistic three-dimensional crystal-lubricant-crystal geometry. Results show that the flux of lubricant particles associated to the advancing soliton lines gives rise here too to a quantized velocity ratio. Moreover, depending on the interface lattice spacing mismatch, both forward and backward quantized motion of the lubricant is predicted. The persistence under realistic conditions of the dynamically pinned state and quantized sliding is further investigated by varying sliding speed, temperature, load, and lubricant film thickness. The possibilities of experimental observation of quantized sliding are also discussed. Comment: 14 pages, 16 figures |
| DOI: | 10.48550/arxiv.1402.4290 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::891b8db8780d0b15ad964d88f537fe2b |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....891b8db8780d0b15ad964d88f537fe2b |
| قاعدة البيانات: | OpenAIRE |
| DOI: | 10.48550/arxiv.1402.4290 |
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