Observation of depth-dependent atomic displacements related to dislocations in GaN by optical sectioning in the STEM
We demonstrate that it is possible to observe depth-dependent atomic displacements in a GaN crystal due to the sufficiently small depth of field achievable in the aberration-corrected scanning transmission electron microscope. The depth-dependent displacements associated with the Eshelby twist of sc...
| Main Authors: | , , , , , , , , |
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| Format: | Conference item |
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Institute of Physics Publishing
2014
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| _version_ | 1826304639527550976 |
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| author | Lozano, J Guerrero-Lebrero, M Yasuhara, A Okinishi, E Zhang, S Humphreys, C Galindo, P Hirsch, P Nellist, P |
| author_facet | Lozano, J Guerrero-Lebrero, M Yasuhara, A Okinishi, E Zhang, S Humphreys, C Galindo, P Hirsch, P Nellist, P |
| author_sort | Lozano, J |
| collection | OXFORD |
| description | We demonstrate that it is possible to observe depth-dependent atomic displacements in a GaN crystal due to the sufficiently small depth of field achievable in the aberration-corrected scanning transmission electron microscope. The depth-dependent displacements associated with the Eshelby twist of screw dislocations in GaN viewed end on are directly imaged, and makes possible the determination of the sign of the Burgers vector of the dislocation. The experimental results are in good agreement with theoretical images. © Published under licence by IOP Publishing Ltd. |
| first_indexed | 2024-03-07T06:20:51Z |
| format | Conference item |
| id | oxford-uuid:f2aace1d-5624-4a80-aee6-12fc14ea9dcd |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:20:51Z |
| publishDate | 2014 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | oxford-uuid:f2aace1d-5624-4a80-aee6-12fc14ea9dcd2022-03-27T12:05:44ZObservation of depth-dependent atomic displacements related to dislocations in GaN by optical sectioning in the STEMConference itemhttp://purl.org/coar/resource_type/c_5794uuid:f2aace1d-5624-4a80-aee6-12fc14ea9dcdSymplectic Elements at OxfordInstitute of Physics Publishing2014Lozano, JGuerrero-Lebrero, MYasuhara, AOkinishi, EZhang, SHumphreys, CGalindo, PHirsch, PNellist, PWe demonstrate that it is possible to observe depth-dependent atomic displacements in a GaN crystal due to the sufficiently small depth of field achievable in the aberration-corrected scanning transmission electron microscope. The depth-dependent displacements associated with the Eshelby twist of screw dislocations in GaN viewed end on are directly imaged, and makes possible the determination of the sign of the Burgers vector of the dislocation. The experimental results are in good agreement with theoretical images. © Published under licence by IOP Publishing Ltd. |
| spellingShingle | Lozano, J Guerrero-Lebrero, M Yasuhara, A Okinishi, E Zhang, S Humphreys, C Galindo, P Hirsch, P Nellist, P Observation of depth-dependent atomic displacements related to dislocations in GaN by optical sectioning in the STEM |
| title | Observation of depth-dependent atomic displacements related to dislocations in GaN by optical sectioning in the STEM |
| title_full | Observation of depth-dependent atomic displacements related to dislocations in GaN by optical sectioning in the STEM |
| title_fullStr | Observation of depth-dependent atomic displacements related to dislocations in GaN by optical sectioning in the STEM |
| title_full_unstemmed | Observation of depth-dependent atomic displacements related to dislocations in GaN by optical sectioning in the STEM |
| title_short | Observation of depth-dependent atomic displacements related to dislocations in GaN by optical sectioning in the STEM |
| title_sort | observation of depth dependent atomic displacements related to dislocations in gan by optical sectioning in the stem |
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