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Interface polarization coupling in piezoelectric-semiconductor ferroelectric heterostructures
We present a dielectric continuum model approach for studying the electrical polarization properties of interface polarization coupled BaTiO3, BaTiO3-ZnO, and ZnO-BaTiO3-ZnO thin-film structures consisting...
Publicationss-d exchange interaction induced magnetoresistance in magnetic ZnO
The magnetoresistance (MR) effect in Co-doped ZnO films prepared by pulsed laser deposition on a-plane sapphire substrates with electron concentration at 5 K ranging from 8.3×1017 cm−3 to 9.9×1019...
PublicationsElectron paramagnetic resonance of Zn1-xMnxO thin films and single crystals
X-band electron paramagnetic resonance spectra were recorded for Zn1−xMnxO films grown by pulsed laser deposition and a single crystal for comparison. For different Mn concentrations in Zn1−xMnxO films...
PublicationsBand dispersion relations of zinc-blende and wurtzite InN
The fundamental band-gap energy of the III-V compound semiconductor InN has been corrected due to recent experiments on high-quality InN samples. The advances in the InN growth technique also open new...
PublicationsMetal-insulator transition in co-doped ZnO: Magnetotransport properties
The magnetotransport properties [magnetoresistance (MR) and Hall effect] of Co-doped ZnO films prepared by pulsed laser deposition have been investigated around the metal-insulator transition _MIT_ as...
PublicationsBand-structure pseudopotential calculation of zinc-blende and wurtzite AlN, GaN, and InN
The electronic properties of the zinc-blende and wurtzite group-III nitride compound semiconductors AlN, GaN, and InN are studied within the empirical pseudopotential approach. Using ionic model potentials...
PublicationsDefects in virgin and N+-implanted ZnO single crystals studied by positron annihilation, Hall effect, and deep-level transient spectroscopy
High-quality single crystals of ZnO in the as-grown and N+ ion-implanted states have been investigated using a combination of three experimental techniques—namely, positron lifetime/slow positron implantation...
PublicationsOrigin of magnetic moments in defective TiO2 single crystals
In this Brief Report we show that ferromagnetism can be induced in pure TiO2 single crystals by oxygen ion irradiation. By combining x-ray diffraction, Raman scattering, and electron-spin resonance spectroscopy,...
PublicationsStructural characterization of H plasma-doped ZnO single crystals by Hall measurements and photoluminescence studies
Nominally undoped, hydrothermally grown ZnO single crystals have been investigated prior to and after doping in remote H plasma. Characterizations have been made by temperaturedependent Hall effect (TDH)...
PublicationsResistive switching in unstructured, polycrystalline BiFeO3 thin films with downscaled electrodes
Kelvin probe force microscopy (KPFM) is used to investigate the electrostatic force between a conductive probe and doped semiconductors. The observed frequency dependence of the probed KPFM bias is strongly...
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