TY - JOUR
T1 - Gigantic maximum of nanoscale noncontact friction
AU - Saitoh, Kohta
AU - Hayashi, Kenichi
AU - Shibayama, Yoshiyuki
AU - Shirahama, Keiya
PY - 2010/12/1
Y1 - 2010/12/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.105.236103
DO - 10.1103/PhysRevLett.105.236103
M3 - Article
AN - SCOPUS:78649854754
SN - 0031-9007
VL - 105
JO - Physical Review Letters
JF - Physical Review Letters
IS - 23
M1 - 236103
ER -