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Pseudopotential band structures of rocksalt MgO, ZnO, and Mg1-xZnxO
The electronic properties of the rocksalt group-II oxides MgO and ZnO are investigated by means of the empirical pseudopotential method. Using a simple empty core model potential and experimentally known...
PublikationenDeep acceptor states in ZnO single crystals
The authors report the observation of both acceptor- and donorlike defects in ZnO by deep level transient spectroscopy. The observation is facilitated by using a p-n junction allowing the injection of...
PublikationenRoom temperature ferromagnetism in Mn-doped ZnO films mediated by acceptor defects
Mn-doped ZnO films with preferred c-axis growth orientation were prepared by pulsed laser deposition under N2 atmosphere on a-plane sapphire substrates. Large positive magnetoresistance amounting to 60%...
PublikationenRoom temperature ferromagnetism in carbon-implanted ZnO
Unexpected ferromagnetism has been observed in carbon doped ZnO films grown by pulsed laser deposition [H. Pan et al., Phys. Rev. Lett. 99, 127201 (2007)]. In this letter, we introduce carbon into ZnO...
PublikationenRoom temperature ferromagnetism in ZnO films due to defects
ZnO films were prepared by pulsed laser deposition on a-plane sapphire substrates under N2 atmosphere. Ferromagnetic loops were obtained with the superconducting quantum interference device at room temperature,...
PublikationenControl of Rectifying and Resistive Switching Behavior in BiFeO3 Thin Films
BiFeO3 thin films have been grown on Pt/Ti/SiO2/Si substrates with pulsed laser deposition using Au as the top electrode. The resistive switching property of the Au/BiFeO3/Pt stack has been significantly...
PublikationenElectrical and optical spectroscopy on ZnO : Co thin films
Magnetic oxide semiconductors, for example the highly transparent and intrinsically n-type conducting zinc oxide doped with the 3d transition metal Co (ZnO:Co), are promising for the emerging field of...
PublikationenCathodoluminescence of large-area PLD grown ZnO thin films measured in transmission and reflection
Epitaxial ZnO thin films on sapphire substrates can be used as fast and laterally homogeneous scintillators to convert electrons into photons, for example for imaging purpose. We report on the improvement...
PublikationenProperties of phosphorus doped ZnO
We report the electrical and optical properties of P-doped epitaxial ZnO thin films grown heteroepitaxially on sapphire substrates or homoepitaxially on ZnO wafers grown by the hydrothermal method, respectively....
PublikationenOptical and structural properties of MgZnO/ZnO hetero- and double heterostructures grown by pulsed laser deposition
MgZnO thin films, MgZnO/ZnO heterostructures (HS) and double heterostructures (DHS) have been prepared on a-plane sapphire substrates by means of pulsed laser deposition (PLD). A linear blueshift of the...
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