Robust superlubricity in graphene/h-BN heterojunctions

Itai Leven, Dana Krepel, Ortal Shemesh, Oded Hod

Research output: Contribution to journalArticlepeer-review

Abstract

The sliding energy landscape of the heterogeneous graphene/h-BN interface is studied by means of the registry index. For a graphene flake sliding on top of h-BN, the anisotropy of the sliding energy corrugation with respect to the misfit angle between the two naturally mismatched lattices is found to reduce with the flake size. For sufficiently large flakes, the sliding energy corrugation is expected to be at least an order of magnitude lower than that obtained for matching lattices regardless of the relative interlayer orientation. Therefore, in contrast to the case of the homogeneous graphene interface where flake reorientations are known to eliminate superlubricty, here, a stable low-friction state is expected to occur. Our results mark heterogeneous layered interfaces as promising candidates for dry lubrication purposes.

Original languageEnglish
Pages (from-to)115-120
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume4
Issue number1
DOIs
StatePublished - 3 Jan 2013

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