The emission properties of bent ZnO microwires with diameters ranging from 1.5 μm to 7.3 μm are
systematically investigated by cathodoluminescence spectroscopy at T ≈ 10 K. We induced
uniaxial strains along the c-axis of up to ±2.9 %. At these high strain values, we observe a nonlinear
shift of the emission energy with respect to the induced strain, and the magnitude of the
energy shift depends on the sign of the strain. The linear and non-linear deformation potentials
were determined to be D1=−2.50±0.05 eV and D2=−15.0±0.5 eV, respectively. The nonlinearity
of the energy shift is also reflected in the observed spectral broadening of the emission
peak as a function of the locally induced strain, which decreases with increasing strain on the compressive
side and increases on the tensile side.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:23556 |
| Date | 07 August 2018 |
| Creators | Sturm, Chris, Wille, Marcel, Lenzner, Jörg, Khujanov, Sherzod, Grundmann, Marius |
| Publisher | American Institute of Physics, Universität Leipzig |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 0003-6951, 1077-3118, 062103 |
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