Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1997-06-26
Physics
Condensed Matter
Statistical Mechanics
RevTex, 14 pages, 6 PostScript figures, to appear in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.56.4261
Static and dynamic frictional phenomena at the interface with random impurities are investigated in a two-chain model with incommensurate structure. Static frictional force is caused by the impurity pinning and/or by the pinning due to the regular potential, which is responsible for the breaking of analyticity transition for impurity-free cases. It is confirmed that the static frictional force is always finite in the presence of impurities, in contrast to the impurity-free system. The nature of impurity pinning is discussed in connection with that in density waves. The kinetic frictional force of a steady sliding state is also investigated numerically. The relationship between the sliding velocity dependence of the kinetic frictional force and the strength of impurity potential is discussed.
Kawaguchi Takaaki
Matsukawa Hiroshi
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