|
1
|
Carvalho D, Müller-Caspary K, Schowalter M, Grieb T, Mehrtens T, Rosenauer A, Ben T, García R, Redondo-Cubero A, Lorenz K, Daudin B, Morales FM. Direct Measurement of Polarization-Induced Fields in GaN/AlN by Nano-Beam Electron Diffraction. Sci Rep 2016; 6:28459. [PMID: 27350322 PMCID: PMC4923855 DOI: 10.1038/srep28459] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 06/06/2016] [Indexed: 11/30/2022] Open
Abstract
The built-in piezoelectric fields in group III-nitrides can act as road blocks on the way to maximizing the efficiency of opto-electronic devices. In order to overcome this limitation, a proper characterization of these fields is necessary. In this work nano-beam electron diffraction in scanning transmission electron microscopy mode has been used to simultaneously measure the strain state and the induced piezoelectric fields in a GaN/AlN multiple quantum well system.
Collapse
Affiliation(s)
- Daniel Carvalho
- Department of Materials Science and Metallurgic Engineering, and Inorganic Chemistry, Faculty of Sciences, University of Cádiz, Spain.,IMEYMAT: Institute of Research on Electron Microscopy and Materials of the University of Cádiz, Spain
| | - Knut Müller-Caspary
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
| | - Marco Schowalter
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
| | - Tim Grieb
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
| | - Thorsten Mehrtens
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
| | - Andreas Rosenauer
- Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
| | - Teresa Ben
- Department of Materials Science and Metallurgic Engineering, and Inorganic Chemistry, Faculty of Sciences, University of Cádiz, Spain.,IMEYMAT: Institute of Research on Electron Microscopy and Materials of the University of Cádiz, Spain
| | - Rafael García
- Department of Materials Science and Metallurgic Engineering, and Inorganic Chemistry, Faculty of Sciences, University of Cádiz, Spain.,IMEYMAT: Institute of Research on Electron Microscopy and Materials of the University of Cádiz, Spain
| | - Andrés Redondo-Cubero
- IPFN, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal.,Departamento de Física Aplicada y Centro de Micro-Análisis de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Katharina Lorenz
- IPFN, Instituto Superior Técnico, Campus Tecnológico e Nuclear, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal
| | - Bruno Daudin
- Univ. Grenoble Alpes, CEA/CNRS Group, "Nanophysique et Semiconducteurs", F-38000 Grenoble, France
| | - Francisco M Morales
- Department of Materials Science and Metallurgic Engineering, and Inorganic Chemistry, Faculty of Sciences, University of Cádiz, Spain.,IMEYMAT: Institute of Research on Electron Microscopy and Materials of the University of Cádiz, Spain
| |
Collapse
|