Determination of the spontaneous polarization of wurtzite (Mg,Zn)O

Journal Article · Mon May 12 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4875919· OSTI ID:22273427

Stölzel, Marko; Müller, Alexander; Benndorf, Gabriele; Lorenz, Michael; Grundmann, Marius ^[1]; Patzig, Christian; Höche, Thomas ^[2]

---

1. Institut für Experimentelle Physik II, Universität Leipzig, Linnéstr. 5, 04103 Leipzig (Germany)
2. Fraunhofer Institute for Mechanics of Materials IWM, Center for Applied Microstructure Diagnostics, Walter-Huelse-Straße 1, 06120 Halle (Saale) (Germany)

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/m{sup 2} was determined for Mg{sub x} Zn{sub 1−x} O.

• OSTI ID: 22273427
• Journal Information: Applied Physics Letters, Vol. 104, Issue 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MAGNESIUM
PIEZOELECTRICITY
POISSON EQUATION
POLARIZATION
QUANTUM WELLS
RECOMBINATION
ZINC OXIDES