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

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.
Authors:
; ; ; ;  [1] ; ;  [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)
Publication Date:
OSTI Identifier:
22273427
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MAGNESIUM; PIEZOELECTRICITY; POISSON EQUATION; POLARIZATION; QUANTUM WELLS; RECOMBINATION; ZINC OXIDES