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Self-interstitial in germanium

Lookup NU author(s): Dr Jon Goss, Professor Patrick Briddon

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Abstract

Low-temperature radiation damage in n- and p-type Ge is strikingly different, reflecting the charge-dependent properties of vacancies and self-interstitials. We find, using density functional theory, that in Ge the interstitial is bistable, preferring a split configuration when neutral and an open cage configuration when positively charged. The split configuration is inert while the cage configuration acts as a double donor. We evaluate the migration energies of the defects and show that the theory is able to explain the principal results of low-temperature electron-irradiation experiments. © 2007 The American Physical Society.


Publication metadata

Author(s): Carvalho A, Jones R, Janke C, Goss JP, Briddon PR, Coutinho J, Oberg S

Publication type: Article

Publication status: Published

Journal: Physical Review Letters

Year: 2007

Volume: 99

Issue: 17

ISSN (print): 0031-9007

ISSN (electronic): 1079-7114

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevLett.99.175502

DOI: 10.1103/PhysRevLett.99.175502


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