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Abstract
Co-crystallization of zinc oxide (ZnO) and zinc telluride (ZnTe) from a melt at high pressure results in the formation of ZnO-ZnTe composites with interesting physical properties that differ from those of the initial phases. The features of co-crystallization in the ZnO-ZnTe system at high pressure were studied using powder X-ray diffraction, scanning (SEM) and transmission (TEM) electron microscopy, energy dispersive X-ray spectroscopy (EDX), Raman spectroscopy, and electron paramagnetic resonance (EPR) of the quenched samples, and a mechanism of successive (layer-by-layer) crystallization from the melt was proposed. Measurements of the Hall effect and thermoelectric properties revealed that the composites exhibit p-type conductivity. The Seebeck coefficients and temperature dependences of electrical and thermal conductivity were also determined.
Supplementary materials
Title
Supporting Information
Description
Table S1. Results of energy dispersive X-ray spectroscopy. Table S2. Rietveld refinement of unit cell parameters. Table S3. Calculated texture for ZnO and ZnTe phases. Fig. S1. Raman spectra of ZT10 and ZT50 samples. Fig. S2. A picture of zinc oxide single crystals.
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