6558 Search results for: „“
Kelvin probe force microscopy in the presence of intrinsic local electric fields
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...
PublicationsOn the origin of carrier localization on two-dimensional GaN substitution layers embedded in GaAs
The electronic properties of a nitrogen atomic layer embedded in GaAs are studied by means of the empirical pseudopotential (EPP) method in a periodic modelling approach. The electronic properties of a...
PublicationsQuantitative scanning capacitance microscopy
Scanning capacitance microscopy is an analytical technique able to provide direct carrier distribution information on the nanoscale using HF amplitude detection and lock-in techniques. For the reliability...
PublicationsElectronic properties of defects in pulsed-laser deposition grown ZnO with levels at 300 and 370 meV below the conduction band
We have used deep level transient spectroscopy (DLTS) to characterize defects in ZnO grown by pulsed-laser deposition (PLD). Using high resolution Laplace DLTS, we found that at the high temperature side...
PublicationsMn-implanted, polycrystalline indium tin oxide and indium oxide films
Polycrystalline conducting, ca. 250 nm thick indium tin oxide (ITO) and indium oxide (IO) films grown on SiO2/Si substrates using reactive magnetron sputtering, have been implanted with 1 and 5 at.% of...
PublicationsParamagnetic Mn-implanted amorphous Si
Different fluences of Mn ions have been implanted into 200 nm thick, n-type conducting amorphous Si films on a cold stage cooled by liquid N2 with a Mn concentration in MnxSi1-x ranging from x = 0.0006...
PublicationsCharacterization and local magnetic modification of ion irradiated GaMnAs
We study the influence of ion irradiation on magnetic, magneto-transport and structural properties in Ga0.94Mn0.06As films. The carrier concentration is accurately controlled by defects introduced via...
PublicationsMagnetic force microscopy studies on the magnetic ordering in organic materials induced by high-energy proton irradiation
In this study, ferromagnetic microstructures in highly oriented pyrolytic graphite and superparamagnetic spots in polyimide foils were created by 2.25 MeV proton microbeam irradiation and characterized...
PublicationsMagnetic carbon: A new application for ion microbeams
In this study ferromagnetic microstructures in highly oriented pyrolytic graphite (HOPG) were created by 2.25 MeV proton microbeam irradiation and characterized using AFM/MFM and SQUID measurements. For...
PublicationsInverse spinel ZnFe2O4 nanoparticles synthesized by ion implantation and post-annealing: An investigation using X-ray spectroscopy and magneto-transport
Noncrystalline ZnFe2O4 has been investigated intensively due to the drastic difference in cation distribution compared with bulk materials. We previously synthesized ZnFe2O4 nanoparticles by ion implantation...
Publications