Measurements of Soliton Trapping and Motion in Trans-Polyacetylene Using Dynamic Nuclear Polarization
- 1 February 1985
- journal article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 117 (1) , 447-454
- https://doi.org/10.1080/00268948508074663
Abstract
The motion of solitons in undoped trans-(CH)x is studied over the temperature range 1.5–300 K using dynamic nuclear polarization. The results of a theoretical model for the combined solid state and Overhauser effects in terms of the time dependence of the electron nuclear interaction due to motion of electrons is presented. Its application to the experiment shows that most of the solitons are trapped below 30 K and that the mobile solitons above 30 K have a diffusion coefficient that is approximately proportional to the square root of the temperature. At 300 K the time for a soliton to diffuse its length is greater than or equal to 1.7 × 10−11 seconds.Keywords
This publication has 5 references indexed in Scilit:
- Frequency dependence of electron spin-lattice relaxation rate at 5–450 MHz in pristine trans-polyacetylene --- new evidence of one dimensional diffusive motion of electron spin (neutral soliton) ---Solid State Communications, 1984
- Magnetic-resonance studies in undopedtrans-polyacetylene. IIPhysical Review B, 1983
- Spin dynamics at low temperature in undoped trans-polyacetylene, (CH)xSolid State Communications, 1981
- Electron spin resonance studies of magnetic soliton defects in polyacetyleneThe Journal of Chemical Physics, 1980
- Nuclear relaxation and Overhauser effect in a nearly-one-dimensional Heisenberg systemPhysical Review B, 1974