115 citations · 956 across the 28 of their papers we have counts for
17 papers · 1 filter
Interaction of dopants with the I-type basal stacking fault in hexagonal-diamond Si
Marc Túnica, Perpetua Wanjiru Muchiri, Alberto Zobelli +3
Recently synthesized hexagonal-diamond silicon, germanium, and silicon-germanium nanowires exhibit remarkable optical and electronic properties when compared to cubic-diamond polyt…
Direct measurement of the longitudinal exciton dispersion in hBN by resonant inelastic x-ray scattering
Alessandro Nicolaou, Kari Ruotsalainen, Laura Susana +7
We report resonant inelastic X-ray scattering (RIXS) measurements on the prototypical hexagonal boron nitride hBN layered compound. The RIXS results at the B and N K edges have bee…
Resonant X-ray spectroscopies on Chromium orbitals in CrSBr
Victor Porée, Alberto Zobelli, Amit Pawbake +4
We investigate the Cr electronic structure and excitations in CrSBr, a layered magnetic semiconductor, using a combination of resonant x-ray spectroscopic techniques. X-ray absorpt…
Acceptor and donor impurity levels in hexagonal-diamond silicon
Marc Túnica, Alberto Zobelli, Michele Amato
Recent advances in the characterization of hexagonal-diamond silicon (2H-Si) have shown that this material possesses remarkably different structural, electronic, and optical proper…
On-surface synthesis and evolution of self-assembled poly(-phenylene) chains on Ag(111): a joint experimental and theoretical study
Viktoria V. Ivanovskaya, Alberto Zobelli, Andrea Basagni +6
The growth of controlled 1D carbon-based nanostructures on metal surfaces is a multistep process whose path, activation energies and intermediate metastable states strongly depend…
Electronic structure of folded hexagonal boron nitride
Anthony Impellizzeri, Michele Amato, Chris P. Ewels +1
Folded regions are commonly encountered in a number of hexagonal boron nitride (h-BN) based bulk and nanostructured materials. Two types of structural modifications occur in folded…
Extrinsic doping in group IV hexagonal-diamond type crystals
Michele Amato, Thanayut Kaewmaraya, Alberto Zobelli
Over the last few years, group IV hexagonal-diamond type crystals have acquired great attention in semiconductor physics thanks to the appearance of novel and very effective growth…
Cubic BN optical gap and intragap optically active defects
Anna Tararan, Stefano di Sabatino, Matteo Gatti +6
We report a comprehensive study on the optical properties of cubic boron nitride (c-BN) and its optically active defects. Using electron energy-loss spectroscopy (EELS) within a mo…
Revisiting Graphene Oxide Chemistry via Spatially-Resolved Electron Energy Loss Spectroscopy
Anna Tararan, Alberto Zobelli, Ana M. Benito +2
The type and distribution of oxygen functional groups in graphene oxide (GO) and reduced graphene oxide (RGO) remain still a subject of great debate. Local analytic techniques are…
Interplay between ferroic orders at the FeRh/BaTiO interfaces
Viktoria V. Ivanovskaya, Alberto Zobelli, Alexandre Gloter +2
It has been recently demonstrated that the magnetic state of FeRh can be controlled by electric fields in FeRh/BaTiO heterostructures [R.O. Cherifi et al. Nature Mater…
Evidence for anisotropic dielectric properties of monoclinic hafnia using high-resolution TEM valence electron energy-loss spectroscopy and ab initio time-dependent density-functional theory
Cyril Guedj, Linda Hung, Alberto Zobelli +3
The effect of nanocrystal orientation on the energy loss spectra of monoclinic hafnia (m-HfO) is measured by high resolution transmission electron microscopy (HRTEM) and valenc…
Direct evidence of tungsten clustering in WVO thin films and its effect on the metal-to-insulator transition
Xiaoyan Li, Alexandre Gloter, Alberto Zobelli +4
Substitutional tungsten doping of VO thin films and its effect on the metal-to-insulator transition are investigated by means of X-ray diffraction, Cs-corrected scanni…
Excitons and stacking order in h-BN
Romain Bourrellier, Michele Amato, Luiz Henrique Galvão Tizei +8
The strong excitonic emission at 5.75 eV of hexagonal boron nitride (h-BN) makes this material one of the most promising candidate for light emitting devices in the far ultraviolet…
A comparative study of density functional and density functional tight binding calculations of defects in graphene
Alberto Zobelli, Viktoria V. Ivanovskaya, Philipp Wagner +3
The density functional tight binding approach (DFTB) is well adapted for the study of point and line defects in graphene based systems. After briefly reviewing the use of DFTB in t…
Low energy graphene edge termination via small diameter nanotube formation
Viktoria V. Ivanovskaya, Alberto Zobelli, Philipp Wagner +4
We demonstrate that free graphene sheet edges can curl back on themselves,reconstructing as nanotubes. This results in lower formation energies than any other non-functionalised ed…
Ab initio study of bilateral doping within the MoS2-NbS2 system
Viktoriya V. Ivanovskaya, Alberto Zobelli, Alexandre Gloter +3
We present a systematic study on the stability and the structural and electronic properties of mixed molybdenum-niobium disulphides. Using density functional theory we investigate…
Shaping single walled nanotubes
Alberto Zobelli, Alexandre Gloter, Chris P. Ewels +1
We show that electron irradiation in a dedicated scanning transmission microscope can be used as a nano-electron-lithography technique allowing the controlled reshaping of single w…