Gigantic maximum of nanoscale noncontact friction

Kohta Saitoh, Kenichi Hayashi, Yoshiyuki Shibayama, Keiya Shirahama

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We report measurements of noncontact friction between surfaces of NbSe 2 and SrTiO3 and a sharp Pt-Ir tip that is oscillated laterally by a quartz tuning fork cantilever. At 4.2 K, the friction coefficients on both the metallic and insulating materials show a giant maximum at the tip-surface distance of several nanometers. The maximum is strongly correlated with an increase in the spring constant of the cantilever. These features can be understood phenomenologically by a distance-dependent relaxation mechanism with distributed time scales.

Original languageEnglish
Article number236103
JournalPhysical review letters
Volume105
Issue number23
DOIs
Publication statusPublished - 2010 Dec 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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