Impact of a Strained Periodic Multilayer on the Surface and Crystal Quality of a Semipolar (11–22) GaN Template
Efficient reduction of defects and dislocations in a semipolar (11-22) GaN epilayer with the use of an AlN/GaN strained periodic multilayer is demonstrated. On- A nd off-axis X-ray rocking curve analyses have shown significant improvement in the crystalline qualities with remarkable narrowing in the...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Published: |
American Chemical Society
2019
|
| Subjects: |
| _version_ | 1796962001992286208 |
|---|---|
| author | Makinudin, Abdullah Haaziq Ahmad Omar, Al-Zuhairi Anuar, Afiq Shuhaimi, Ahmad DenBaars, Steven P. Supangat, Azzuliani |
| author_facet | Makinudin, Abdullah Haaziq Ahmad Omar, Al-Zuhairi Anuar, Afiq Shuhaimi, Ahmad DenBaars, Steven P. Supangat, Azzuliani |
| author_sort | Makinudin, Abdullah Haaziq Ahmad |
| collection | UM |
| description | Efficient reduction of defects and dislocations in a semipolar (11-22) GaN epilayer with the use of an AlN/GaN strained periodic multilayer is demonstrated. On- A nd off-axis X-ray rocking curve analyses have shown significant improvement in the crystalline qualities with remarkable narrowing in their respective full width at half-maximum upon utilization of increased AlN/GaN pairs. X-ray reciprocal space mapping revealed a prominent increment in the degree of relaxation state, with notable shrinkage in the diffuse scattering streak. Structural evaluation via transmission electron microscopey illuminates the interruption of defect and dislocation propagation due to the strained periodic multilayers. It was observed that the first 20th pairs exhibited a three-dimensional growth mode owning to numerous defects originating from the AlN/sapphire interface. Such a phenomenon was found to have a positive impact toward accumulating the propagation of defects. The surface morphology analysis elucidates the reduced stripe-like undulations, whereby the terrace-like features in the lower scales endured an enhanced rearrangement favoring the reduced defect density. © 2019 American Chemical Society. |
| first_indexed | 2024-03-06T06:02:32Z |
| format | Article |
| id | um.eprints-24351 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T06:02:32Z |
| publishDate | 2019 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | um.eprints-243512020-05-20T00:39:38Z http://eprints.um.edu.my/24351/ Impact of a Strained Periodic Multilayer on the Surface and Crystal Quality of a Semipolar (11–22) GaN Template Makinudin, Abdullah Haaziq Ahmad Omar, Al-Zuhairi Anuar, Afiq Shuhaimi, Ahmad DenBaars, Steven P. Supangat, Azzuliani Q Science (General) QC Physics Efficient reduction of defects and dislocations in a semipolar (11-22) GaN epilayer with the use of an AlN/GaN strained periodic multilayer is demonstrated. On- A nd off-axis X-ray rocking curve analyses have shown significant improvement in the crystalline qualities with remarkable narrowing in their respective full width at half-maximum upon utilization of increased AlN/GaN pairs. X-ray reciprocal space mapping revealed a prominent increment in the degree of relaxation state, with notable shrinkage in the diffuse scattering streak. Structural evaluation via transmission electron microscopey illuminates the interruption of defect and dislocation propagation due to the strained periodic multilayers. It was observed that the first 20th pairs exhibited a three-dimensional growth mode owning to numerous defects originating from the AlN/sapphire interface. Such a phenomenon was found to have a positive impact toward accumulating the propagation of defects. The surface morphology analysis elucidates the reduced stripe-like undulations, whereby the terrace-like features in the lower scales endured an enhanced rearrangement favoring the reduced defect density. © 2019 American Chemical Society. American Chemical Society 2019 Article PeerReviewed Makinudin, Abdullah Haaziq Ahmad and Omar, Al-Zuhairi and Anuar, Afiq and Shuhaimi, Ahmad and DenBaars, Steven P. and Supangat, Azzuliani (2019) Impact of a Strained Periodic Multilayer on the Surface and Crystal Quality of a Semipolar (11–22) GaN Template. Crystal Growth & Design, 19 (11). pp. 6092-6099. ISSN 1528-7483, DOI https://doi.org/10.1021/acs.cgd.9b00206 <https://doi.org/10.1021/acs.cgd.9b00206>. https://doi.org/10.1021/acs.cgd.9b00206 doi:10.1021/acs.cgd.9b00206 |
| spellingShingle | Q Science (General) QC Physics Makinudin, Abdullah Haaziq Ahmad Omar, Al-Zuhairi Anuar, Afiq Shuhaimi, Ahmad DenBaars, Steven P. Supangat, Azzuliani Impact of a Strained Periodic Multilayer on the Surface and Crystal Quality of a Semipolar (11–22) GaN Template |
| title | Impact of a Strained Periodic Multilayer on the Surface and Crystal Quality of a Semipolar (11–22) GaN Template |
| title_full | Impact of a Strained Periodic Multilayer on the Surface and Crystal Quality of a Semipolar (11–22) GaN Template |
| title_fullStr | Impact of a Strained Periodic Multilayer on the Surface and Crystal Quality of a Semipolar (11–22) GaN Template |
| title_full_unstemmed | Impact of a Strained Periodic Multilayer on the Surface and Crystal Quality of a Semipolar (11–22) GaN Template |
| title_short | Impact of a Strained Periodic Multilayer on the Surface and Crystal Quality of a Semipolar (11–22) GaN Template |
| title_sort | impact of a strained periodic multilayer on the surface and crystal quality of a semipolar 11 22 gan template |
| topic | Q Science (General) QC Physics |
| work_keys_str_mv | AT makinudinabdullahhaaziqahmad impactofastrainedperiodicmultilayeronthesurfaceandcrystalqualityofasemipolar1122gantemplate AT omaralzuhairi impactofastrainedperiodicmultilayeronthesurfaceandcrystalqualityofasemipolar1122gantemplate AT anuarafiq impactofastrainedperiodicmultilayeronthesurfaceandcrystalqualityofasemipolar1122gantemplate AT shuhaimiahmad impactofastrainedperiodicmultilayeronthesurfaceandcrystalqualityofasemipolar1122gantemplate AT denbaarsstevenp impactofastrainedperiodicmultilayeronthesurfaceandcrystalqualityofasemipolar1122gantemplate AT supangatazzuliani impactofastrainedperiodicmultilayeronthesurfaceandcrystalqualityofasemipolar1122gantemplate |