Eur. Phys. J. B 7, 365-369 (1999)
https://doi.org/10.1007/s100510050623

Dynamics of isolated twin boundary in (TMTSF)₂PF₆

Control of its mobility

Division of Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan

Received: 14 April 1998
Accepted: 1 September 1998
Published online: 15 February 1999

Abstract

Intermittent and irregular motion of isolated twin boundary (kink) in organic crystal (TMTSF)₂PF₆ was studied at room temperature. Both the local velocity and the time of intermission are determined not only by external stress and temperature but also by the time (t_w) elapsed after the backward passage and before the following forward one. When the kink moves after longer t_w, its velocity becomes smaller and the time of intermission longer. Both tend to saturate for t_w longer than 10² s. This result indicates that some disorder is induced in the lattice by the backward motion and it is relaxed during t_w. We also found that the effect of the backward motion of one kink on its following motion is equivalent quantitatively to that of the forward motion of the pair-created counterpart.