Dipolar tunnel states in oxidised polyethylene
- 28 September 1977
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 10 (18) , L509-L513
- https://doi.org/10.1088/0022-3719/10/18/003
Abstract
Thermally oxidised polyethylene is known to exhibit two low-temperature dielectric relaxations, each of which has been attributed to tunnelling transitions of dipolar groups containing hydrogen and oxygen. The authors examined these in the subkelvin range and deduced the following tunnel splittings: Vincett's relaxation with H in poly (C2H4), 7.8+or-0.8 mu eV; the same in poly (C2D4), 5.9+or-0.6 mu eV; Carson's relaxation with D in poly (C2H4), 3.4 mu eV (geometric mean). The latter implies an acoustic coupling constant of 35 meV. Moreover the time constant of Carson's relaxation is found to depend not only on the 'impurity' hydrogen isotope but also on the host hydrogen isotope. For different combinations of isotopes it obeys a multiplicative law. The results are related to the polaron-like 'dressing' of tunnelling impurities.Keywords
This publication has 11 references indexed in Scilit:
- Oxidised polyethylene as a paraelectricJournal of Physics and Chemistry of Solids, 1977
- Interaction of two-level tunneling system with phononsPhysica A: Statistical Mechanics and its Applications, 1976
- A dielectric study of molecular relaxation in oxidized and chlorinated polyethylenesJournal of Polymer Science: Polymer Physics Edition, 1976
- Low temperature dielectric relaxations in deuterated polyethyleneSolid State Communications, 1976
- Elastic effects of structural relaxation in glasses at low temperaturesJournal of Non-Crystalline Solids, 1976
- Relaxations diélectriques dans les polyéthylènes à très basses températuresRevue de Physique Appliquée, 1976
- Low-temperature dielectric relaxation in polyethyleneProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1973
- On the ultrasonic attenuation in glasses at low temperaturesThe European Physical Journal A, 1972
- Low temperature dielectric relaxation in polyethylene and related hydrocarbon polymersProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1970
- Kinetics of the alignment of O2− centers in stressed alkali halide crystalsJournal of Physics and Chemistry of Solids, 1966