A5018125717- Electron and X-Ray Spectroscopy Techniques
- Magnetic properties of thin films
- ZnO doping and properties
- Surface and Thin Film Phenomena
- Ion-surface interactions and analysis
- X-ray Spectroscopy and Fluorescence Analysis
- Semiconductor materials and devices
- Advanced Electron Microscopy Techniques and Applications
- Advanced Chemical Physics Studies
- Magnetic Properties and Applications
- Copper-based nanomaterials and applications
- Physics of Superconductivity and Magnetism
- Radiation Detection and Scintillator Technologies
- Gas Sensing Nanomaterials and Sensors
- Electronic and Structural Properties of Oxides
- Ga2O3 and related materials
- Metal and Thin Film Mechanics
- Photocathodes and Microchannel Plates
- Fuel Cells and Related Materials
- Advanced Materials Characterization Techniques
- Advanced Battery Technologies Research
- Advanced Thermoelectric Materials and Devices
- Thin-Film Transistor Technologies
- Catalytic Processes in Materials Science
- Theoretical and Computational Physics
Istituto Nanoscienze
2015-2024
University of Modena and Reggio Emilia
1991-2023
AREA Science Park
2019
Istituto Officina dei Materiali
2019
Superconducting and other Innovative Materials and Devices Institute
2019
Azienda Unita' Sanitaria Locale Di Modena
2017
Istituto Nazionale per la Fisica della Materia
1993-2007
Lomonosov Moscow State University
2005
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
1996-1997
We report first-principles $GW$ results on the dispersion of bulk band-gap edges in three-dimensional topological insulator ${\mathrm{Sb}}_{2}{\mathrm{Te}}_{3}$. find that, independently reference density-functional-theory band structure and crystal-lattice parameters used, one-shot corrections enlarge fundamental gap, bringing its value close agreement with experiment. conclude that cause displacement valence-band maximum (VBM) to $\mathrm{\ensuremath{\Gamma}}$ point, ensuring surface-state...
The morphology of ultrathin epitaxial MgO layers reactively grown on Ag(001) was investigated by using scanning tunnelling microscopy. In the initial deposition stage Ag atoms are partially removed from substrate and form extended monoatomic islands leaving vacancy in itself. On individual terraces is thereafter found at three atomic levels. For submonolayer condensates small height, located original substrate, protruding as well. largest fractional coverage 70%. A limited amount bilayers or...
We report the room-temperature, low-voltage-enabled modulation of optical response hybrid transparent-conductive-oxide/ferroelectric multilayers in infrared spectral range. have fabricated an multilayer consisting Al-doped ZnO (AZO)...
The coupling with plasmonic metal nanoparticles (NPs) represents a promising opportunity to sensitize wide band gap oxides visible light. processes which come into play after the excitation of localized surface plasmon resonances (LSPRs) in NPs largely determine efficiency charge/energy transfer from NP oxide. We report study plasmon-mediated energy mass-selected silver cerium oxide matrix they are embedded. Femtosecond transient absorption spectroscopy is used probe dynamics charge carrier...
Realizing very thin transparent conductive (TCO) films is a key aspect of many applications, but often the film quality tends to worsen at small thicknesses. In this work we demonstrate that Al-doped ZnO (AZO) grown epitaxially on SrTiO3 retain their optimal properties even thicknesses as low 30 nm. We deposit by radio frequency magnetron sputtering and investigate morphology, structure, crystallinity, electrical optical properties. prove Hall mobility epitaxial limited mostly ionized...
We present the results of a study on morphology and magnetic properties size-selected Ni nanoparticles films grown Si/SiOx substrates. The were produced by deposition preformed nanoparticles, using gas aggregation nanocluster source an electric quadrupole mass filter. diameter d particles ranged between 3 10 nm. films, with average thickness t varying from t=0.5 up to t=7 nm, was studied atomic force microscopy scanning electron microscopy, combining in this way information about height...
The combination of photoemission spectroscopies, infrared and UV-VIS absorption, electric measurements has allowed to clarify the mechanisms governing conductivity electronic properties Al-doped ZnO (AZO) films in a wide doping range. contribution defect-related in-gap states conduction been excluded optimally doped (around 4 at. %). appearance gap at high doping, disappearance occupied DOS Fermi level, bands evolution complete picture structure AZO when above %. In this situation,...
Thin films of Cs2Te have been produced and analyzed by Auger depth profiling x-ray photoemission spectroscopy (XPS). The formation the photoemissive material passes through different phases, each them has characterized XPS its total yield in spectral region 3.5–5 eV. Copper molybdenum substrates considered. While Mo behaves to all practical purposes like an ideal support for Cs2Te, strong diffusion from substrate into film observed on photocathodes fabricated Cu. ruggedness tested exposing a...
We review the effects of scattering-interference primary, exciting beam on electron emission from ordered atomic arrays. The yield elastically and inelastically backscattered electrons, Auger electrons secondary shows a marked dependence incidence angle primary electrons. Both similarity relative importance processes experienced by incident excident are discussed. also present recent studies focusing defocusing along chains. interplay between these two determines in-depth profile intensity...
NiO ultrathin films have been prepared under UHV conditions on Ag(001) substrate by metal deposition in ${\mathrm{O}}_{2}$ atmosphere. The were of the amount correspondent to 1 ML (monolayer) presence different oxygen-to-metal flux ratios, investigate oxygen dosage effect structure and composition growing layer stoichiometry Ni oxide. Thicker (up 20 ML) also prepared. has monitored both reciprocal direct space low-energy electron diffraction primary-beam diffraction-modulated emission....
We fabricated a set of arrays single-crystal Fe micron and submicron square elements on MgO using focused ion beam apparatus. The squares have different size ($1\text{\ensuremath{-}}\ensuremath{\mu}\mathrm{m}$ 500-nm side) orientation with respect to the crystalline axes. three patterns were magnetically characterized by means magneto-optical Kerr effect microscopy/magnetometry, symmetry strength their magnetic anisotropy was determined through transverse susceptibility measurements...
Hall magnetometers with active areas down to 100 × nm2 were fabricated patterning gold and Si-doped GaAs films by focused ion beam. For probes, electrical characterization shows that the magnetic flux sensitivity is better than 10−2Φ0 at room temperature. nano-probes made of can work liquid helium temperature 10−1Φ0.
We report an investigation of the magnetic properties Fe films epitaxially grown on NiO layers with (001) orientation. The results are interpreted help a morphological characterization system. onset ferromagnetic behavior for layer is observed at 8 ML and it ascribed to coalescence islands, formed by first stages growth, into larger interconnected islands. At thickness magnetization reversal explained taking account interplay between unidirectional anisotropy, due coupling NiO, uniaxial...
Using scanning tunnelling microscopy and photoelectron diffraction, we have analyzed the nucleation growth behavior of simple (Mg Ca), transition (Ni Fe), noble metals (Ag Au) on MgO films grown Mo(001). With exception gold, particles develop interface planes that are in registry with surface-oxygen lattice MgO(001). To achieve this commensurability, expose facets differ from low-energy surfaces respective adopt crystallographic structures unknown bulk materials. This peculiar demonstrates...
Abstract Scattering interference of primary exciting electrons leads to a dependence the Auger emission intensity on beam incidence angle. For energy in kiloelectron‐volt range, maxima yield occur when is aligned with low‐index crystal axes, therefore angular distribution directly reflects symmetries and degree local order. We investigated potential for this effect, primary‐beam diffraction modulated electron (PDMEE) be used surface structural characterization, comparison...