{"title":"Electron-scale origin of structural superlubricity","authors":"","doi":"10.1016/j.triboint.2024.110294","DOIUrl":null,"url":null,"abstract":"<div><div>First-principles computations are performed to study the phenomenon of structural superlubricity (SSL) relative to self-mismatched heterojunctions, rotating-mismatched homojunctions and curvature-mismatched coaxial double-walled nanotubes. It follows from the computations that the interfacial electron density fluctuation is responsible for all characteristics of SSL and can serve as predicting and describing them efficiently. This result further reveals that SSL comes from the fact that the incommensurable contact of two inert surfaces weakens their electronic interactions considerably. The model of SSL based on the electron redistribution a fortiori overcomes the limitations presented by the models of SSL based on the registry index (RI) or on the local pinning (LP).</div></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1000,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Tribology International","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0301679X24010466","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
First-principles computations are performed to study the phenomenon of structural superlubricity (SSL) relative to self-mismatched heterojunctions, rotating-mismatched homojunctions and curvature-mismatched coaxial double-walled nanotubes. It follows from the computations that the interfacial electron density fluctuation is responsible for all characteristics of SSL and can serve as predicting and describing them efficiently. This result further reveals that SSL comes from the fact that the incommensurable contact of two inert surfaces weakens their electronic interactions considerably. The model of SSL based on the electron redistribution a fortiori overcomes the limitations presented by the models of SSL based on the registry index (RI) or on the local pinning (LP).
期刊介绍:
Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International.
Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.