title: On the luminescence of freshly introduced a-screw dislocations in low-resistance GaN
metadata.name: dc.contributor.author
metadata.value: Medvedev, Oleg
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Vyvenko, Oleg
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Bondarenko, Anton
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2016-04-08T14:59:22Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2016-04-08T14:59:22Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2015-09-05
metadata.lang: -
metadata.name: dc.identifier.issn
metadata.value: 10637826
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/2014
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Using scanning electron microscopy in the cathodoluminescence mode, it is shown that straight segments of a-screw dislocations introduced by plastic deformation at room temperature into unintentionally doped low-resistance gallium nitride luminesce in the spectral range 3.1–3.2 eV at 70 K. The spectral composition of dislocation luminescence shows a fine doublet structure with a component width of ∼15 meV and splitting of ∼30 meV, accompanied by LO-phonon replicas. Luminescent screw dislocations move upon exposure to an electron beam and at low temperatures, but retain immobility for a long time without external excitation. Optical transitions involving the quantum-well states of a stacking fault in a split-dislocation core are considered to be the most probable mechanism of the observed phenomenon.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: Maik Nauka-Interperiodica Publishing
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: GaN
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Dislocations
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Luminescence
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: On the luminescence of freshly introduced a-screw dislocations in low-resistance GaN
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: On the luminescence of fresh dislocations.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/2014/1/On%20the%20luminescence%20of%20fresh%20dislocations.pdf
resources.format: Adobe PDF
resources.size: 2,1 MB