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Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten. Determination of the spontaneous polarization of wurtzite (Mg,Zn)O
| Applied Physics Letters 104 (2014), Nr.19, Art. 192102, 5 S. ISSN: 0003-6951 (Print) ISSN: 1077-3118 ISSN: 1931-9401 (online) |
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| Englisch |
| Zeitschriftenaufsatz |
| Fraunhofer IWM ( IMWS) () |
Abstract
We report on the experimental determination of the spontaneous polarization of wurtzite-(Mg,Zn)O by examination of the recombination dynamics of polar ZnO/(Mg,Zn)O quantum wells (QWs). The thickness-dependent decay time of the unscreened single-exciton states inside the QWs was modeled by a self-consistent solution of Schrödinger- and Poisson-equation to deduce the total polarization across the QW for different Mg-contents inside the barriers. By the separation of the piezoelectric components of the polarization, a linear increase in spontaneous polarization with increasing Mg-content x of P/x = (0.151 ± 0.015) C/m2 was determined for Mgx Zn 1-x O.