Zhang, S;
Li, ML;
Jiang, M;
Xiao, HY;
Scanlon, DO;
Zu, XT;
(2021)
Formation and migration of vacancy defects in GeSe and SnSe.
Journal of Physics B: Atomic, Molecular and Optical Physics
, 54
(3)
, Article 035003. 10.1088/1361-6455/abd9fd.
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Abstract
The GeSe and SnSe have great potential in nuclear detector devices. Under irradiation, the formation and migration of point defects may affect their properties and performance significantly. In this study, a comparative study of vacancy formation and migration in GeSe and SnSe has been carried out by a first-principles method. It is shown that in both compounds the cation vacancies are generally much easier to form than anion vacancies, and the cation vacancies are generally easier to migrate than anion vacancies. For both Ge vacancy and Sn vacancy, the migration is anisotropic and the [322] direction is the most favorable migration pathway. The migration energy barrier are 0.54 eV for Ge vacancy and 0.46–0.52 eV for Sn vacancy, suggesting that vacancy clusters are relatively easy to form in both compounds, which may influence the application of GeSe and SnSe in nuclear detector devices.
| Type: | Article |
|---|---|
| Title: | Formation and migration of vacancy defects in GeSe and SnSe |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-6455/abd9fd |
| Publisher version: | http://doi.org/10.1088/1361-6455/abd9fd |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | GeSe; SnSe; Defect formation; Defect migration; Density functional theory |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10123808 |
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