Abstract: We report on the growth and transport properties of single crystalline Sb doped SnO2 wires grown from chemical vapour deposition. While undoped samples presented semiconducting behaviour, doped ones clearly undergo a transition from an insulating state (dR/dT < 0) to a metallic one (dR/dT > 0) around 130-150 K depending on the doping level. Data analysis in the framework of the metal-to-insulator transition theories allowed us to investigate the underlying physics: electron-electron and electron-phonon interactions were identified as the scattering mechanisms present in the metallic phase, while the conduction mechanism of the semiconducting phase (undoped sample) was characterized by thermal activation and variable range hopping mechanisms. Published by AIP Publishing.
Author(s):Costa, I. M.; Bernardo, E. P.; Marangoni, B. S.; et al.
O Laboratório Aberto de Interatividade para Disseminação do Conhecimento Científico e Tecnológico (LAbI), vinculado à Universidade Federal de São Carlos (UFSCar), é voltado à prática da divulgação científica pautada na interatividade; nas relações entre Ciência, Arte e Tecnologia.
Toward a new generation of white phosphors for solid state lighting using glassy yttrium aluminoborates Abstract: We present a new family of highly emissive white phosphors. These phosphors are based on original glassy yttrium aluminoborates (g-YAB) […]
Writers: L.X. Lovisa and J. Andrés and L. Gracia and M.S. Li and C.A. Paskocimas and M.R.D. Bomio and V.D. Araujo and E. Longo and F.V. Motta Keywords: ZrO2:RE; Photoluminescence; DFT calculations Abstract: Abstract Rare-earth (RE) element-based materials […]