150 citations · 285 across the 10 of their papers we have counts for
11 papers
Site-Specific Orbital Symmetry Breaking in Epitaxial Graphene on Silicon Carbide
Vinod K. Paidi, Yves Joly, Alex Taekyung Lee +5
The epitaxial graphene grown on SiC interface has been the subject of tremendous research efforts to control its electronic transport properties in the quest for graphene electroni…
The molecular chemistry of nanoscale organic matter in asteroid Ryugu
Christian Vollmer, Demie Kepaptsoglou, Johannes Lier +2
The analysis of biorelevant molecules in returned mission samples such as from the carbonaceous asteroid (162173) Ryugu is key to unravelling the role of extraterrestrial organics…
Fabrication and characterization of boron-terminated tetravacancies in monolayer hBN using STEM, EELS and electron ptychography
Dana O. Byrne, Stephanie M. Ribet, Demie Kepaptsoglou +3
Tetravacancies in monolayer hexagonal boron nitride (hBN) with consistent edge termination (boron or nitrogen) form triangular nanopores with electrostatic potentials that can be l…
Magnon spectroscopy in the electron microscope
Demie Kepaptsoglou, José Ángel Castellanos-Reyes, Adam Kerrigan +9
The miniaturisation of transistors is approaching its limits due to challenges in heat management and information transfer speed. To overcome these obstacles, emerging technologies…
Evaluating the local bandgap across InxGa1-xAs multiple quantum wells in a metamorphic laser via low-loss EELS
Nicholas Stephen, Ivan Pinto-Huguet, Robert Lawrence +8
Using high resolution scanning transmission electron microscopy and low-loss electron energy loss spectroscopy, we correlate the local bandgap (Eg), indium concentration, and strai…
Theory of momentum-resolved magnon electron energy loss spectra: The case of Yttrium Iron Garnet
Julio A. do Nascimento, Phil J. Hasnip, S. A. Cavill +5
We explore the inelastic spectra of electrons impinging in a magnetic system. The methodology here presented is intended to highlight the charge-dependent interaction of the electr…
Confined magnon dispersion in ferromagnetic and antiferromagnetic thin films in a second quantization approach: the case of Fe and NiO
Julio A. do Nascimento, Adam Kerrigan, S. A. Cavill +4
We present a methodology based on the calculation of the inelastic scattering from magnons via the spin scattering function in confined geometries such as thin films using a second…
Unveiling the impact of temperature on magnon diffuse scattering detection in the transmission electron microscope
José Ángel Castellanos-Reyes, Paul Zeiger, Anders Bergman +4
Magnon diffuse scattering (MDS) signals could be studied with high spatial resolution in scanning transmission electron microscopy (STEM), thanks to recent technological progress i…
Magnon diffuse scattering in scanning transmission electron microscopy
Keenan Lyon, Anders Bergman, Paul Zeiger +4
We present a theory and a simulation of thermal diffuse scattering due to the excitation of magnons in scanning transmission electron microscopy. The calculations indicate that mag…
Towards atomically precise manipulation of 2D nanostructures in the electron microscope
Toma Susi, Demie Kepaptsoglou, Yung-Chang Lin +4
Despite decades of research, the ultimate goal of nanotechnology--top-down manipulation of individual atoms--has been directly achieved with only one technique: scanning probe micr…
Silicon-carbon bond inversions driven by 60 keV electrons in graphene
Toma Susi, Jani Kotakoski, Demie Kepaptsoglou +8
We demonstrate that 60 keV electron irradiation drives the diffusion of threefold coordinated Si dopants in graphene by one lattice site at a time. First principles simulations rev…