STONEHAM, AM;
(1972)
QUANTUM-THEORY OF DIFFUSION - TEMPERATURE DEPENDENCE OF DIFFUSION OF LIGHT INTERSTITIALS IN DEBYE SOLIDS.
J PHYS F MET PHYS
, 2
(3)
417 -420.
10.1088/0305-4608/2/3/009.
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Abstract
The temperature dependence of the motion of light interstitials is calculated using the quantum theory of Flynn and Stoneham (1970). The results are compared with the asymptotic expressions given previously. They show that the high temperature asymptotic is accurate over a wider range of temperature than expected, whereas the low temperature form is of very restricted application. Deviations from the asymptote depend both on the temperature and on the ratio of the activation energy to the Debye energy. Results for protons in Ta agree remarkably well with the theory for an activation energy 0.188 eV and for a hopping integral J of 29% of the Debye energy.
| Type: | Article |
|---|---|
| Title: | QUANTUM-THEORY OF DIFFUSION - TEMPERATURE DEPENDENCE OF DIFFUSION OF LIGHT INTERSTITIALS IN DEBYE SOLIDS |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/0305-4608/2/3/009 |
| Publisher version: | http://dx.doi.org/10.1088/0305-4608/2/3/009 |
| Language: | English |
| Additional information: | Text made available to UCL Discovery by kind permission of IOP Publishing, 2012 |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/59725 |
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