131 citations · 750 across the 61 of their papers we have counts for
62 papers
Charge-State Dependence of Electronic Excitations in keV Ions Transmitted Through Solids Probed by Ion-Photon Coincidence Measurements
Kevin Vomschee, Radek Holeňák, Svenja Lohmann +2
Investigating the electronic excitations caused by light keV ions in matter contributes to a better understanding of materials modification such as space weathering or plasma-wall…
Interface-Controlled Defect Engineering in TiN/TaN Superlattices for Enhanced Hardness and Fracture Toughness
Zecui Gaoa, Qimin Wang, Julian Buchinger +6
TiNTaN superlattice coatings were designed to investigate how atomic-scale interface chemistry and defect-stabilized TaN layers govern hardness and fracture toughness. Guided by fi…
Quantitative Analysis of Composition and Contamination of Atomically Thin Materials by Recoil-Projectile Coincidence in Ion Transmission
Carolin Frank, Kevin Vomschee, Tuan Thien Tran +6
Surface contamination strongly affects the intrinsic properties of nanoscale materials, making its reliable identification and quantification crucial for both accurate experimental…
Rainbow Scattering from Graphene
Carolin Frank, Kevin Vomschee, Radek Holeňák +3
We report the experimental observation of atomic rainbow scattering of 40 keV Xe ions transmitted through self-supporting single-layer graphene using time-of-flight medium ener…
Impact of O concentration on the thermal stability and decomposition mechanism of (Cr,Al)N compared to (Ti,Al)N thin films
Pauline Kümmerl, Ganesh Kumar Nayak, Felix Leinenbach +6
The composition-dependent thermal stability of (CrAl)(ON) thin films with O concentrations of y = 0, 0.15, and 0.40…
Probing formation and epitaxy of ultrathin Titanium Silicide using low and medium energy ion scattering
Philipp M. Wolf, Eduardo Pitthan, Zhen Zhang +3
Titanium silicide is a key contact material in advanced three-dimensional semiconductor device architectures. Here, we examine the formation of ultrathin Ti-silicide on Si(100) usi…
Long-Range Magnetic Order in Structurally Embedded Mesospin Metamaterials
Christina Vantaraki, Oier Bikondoa, Matías P. Grassi +11
Engineered assemblies of interacting magnetic elements-magnetic metamaterials-provide a powerful route to tailor collective magnetic order and dynamics. By structuring matter at th…
Kinetics of the photochromic effect in oxygen-containing rare-earth hydrides
Dmitrii Moldarev, Tuan T. Tran, Max Wolff +1
The kinetics of the photochromic reaction of oxygen-containing rare-earth hydrides is commonly described by an exponential function assuming a single-step process. In this paper, w…
Role of hydrogen dynamics and deposition conditions in photochromic YHO/MoO bilayer films
Edvards Strods, Martins Zubkins, Viktors Vibornijs +6
Oxygen-containing yttrium hydride (YHO) and molybdenum trioxide (MoO) bilayer films (YHO/MoO) are produced using reactive magnetron sputtering, and their photochromic prope…
Mobility of single vacancies and adatoms in graphene at room temperature
Tuan T. Tran, Per O. Å. Persson, Ngan Pham +2
We investigate the mobility of structural defects, adatoms, and defect-adatom combinations in self-supporting graphene subjected to keV ion irradiation. In the first scenario, homo…
The Role of 11B4C Interlayers in Enhancing Fe/Si Multilayer Performance for Polarized Neutron Mirrors
Anton Zubayer, Fredrik Eriksson, Martin Falk +15
This study investigates the effects of incorporating 11B4C interlayers into Fe/Si multilayers, with a focus on interface quality, reflectivity, polarization, and magnetic propertie…
Magnetic texture control in ion-implanted metamaterials
Christina Vantaraki, Kristina Ignatova, Dmitrii Moldarev +5
We study experimentally the impact of the additive fabrication method on the magnetic properties of Fe-implanted Pd square artificial spin ice lattices. Our findings show that…
Control of Ferrimagnetic Compensation and Perpendicular Anisotropy in TbCo with H ion implantation
Robbie G. Hunt, Dmitrii Moldarev, Matías P. Grassi +2
The tuning of magnetic properties through electrochemical loading of hydrogen has recently attracted significant interest as a way to manipulate magnetic devices with electric fiel…
Charge state dynamics of keV ions in solids
Radek Holeňák, Kevin Vomschee, Eleni Ntemou +2
Fast dynamic processes between electrons in solids and a foreign atom represent a fundamental challenge for describing interactions in many-body systems and are a prerequisite for…
Inverse spillover and dimensionality effects on interstitial hydrogen
Kristina Komander, Gunnar K. Pálsson, Sotirios A. Droulias +4
Nanoscaling interstitial metal hydrides offers opportunities for hydrogenation applications by enhancing kinetics, increasing surface area, and allowing for tunable properties. The…
The influence of geometry and specific electronic and nuclear energy deposition on ion-stimulated desorption from thin self-supporting membranes
Radek Holeňák, Michaela Malatinová, Eleni Ntemou +2
We investigate the dependence of the yield of positive secondary ions created upon impact of primary He, B and Ne ions on geometry and electronic and nuclear energy deposition by t…
Magnetic metamaterials by ion-implantation
Christina Vantaraki, Petter Ström, Tuan T. Tran +6
We present a method for the additive fabrication of planar magnetic nanoarrays with minimal surface roughness. Synthesis is accomplished by combining electron-beam lithography, use…
Sputter Yields of the Lunar Surface: Experimental Validation and Numerical Modelling of Solar Wind Sputtering of Apollo 16 Soils
Johannes Brötzner, Herbert Biber, Paul Stefan Szabo +12
Sputtering by solar wind ions is a key process driving the ejection of high-energy particles into the exospheres of airless bodies like asteroids, Mercury and the Moon. In view of…
Magnetic Order and Long-Range Interactions in Mesoscopic Ising Chains
Christina Vantaraki, Matías P. Grassi, Kristina Ignatova +4
We investigate the design of magnetic ordering in one-dimensional mesoscopic magnetic Ising chains by modulating long-range interactions. These interactions are affected by geometr…
Telecom light-emitting diodes based on nanoconfined self-assembled silicon-based color centers
Andreas Salomon, Johannes Aberl, Enrique Prado Navarrete +4
Silicon color centers (SiCCs) have recently emerged as potential building blocks for light emitters in Si photonics, quantum emitters with spin storage capabilities, and Si-based q…
Prediction and identification of point defect fingerprints in X-ray photoelectron spectra of TiN with 1.18 1.37
Pavel Ondračka, Pauline Kümmerl, Marcus Hans +5
We investigate the effect of selected N and Ti point defects in 1 TiN on N 1s and Ti\,2p binding energies (BE) by experiments and ab initio calculations. X-ray photoelec…
All epitaxial self-assembly of vertically-confined silicon color centers using ultra-low temperature epitaxy
Johannes Aberl, Enrique Prado Navarrete, Merve Karaman +12
Silicon-based color-centers (SiCCs) have recently emerged as quantum-light sources that can be combined with telecom-range Si Photonics platforms. Unfortunately, using current SiCC…
Local electronic excitations by slow light ions in tungsten
Evgeniia Ponomareva, Eduardo Pitthan, Radek Holeňák +4
Accurately predicting the electronic energy deposition of ions in materials is an important challenge in both fundamental and applied research. While employing ab initio simulation…
Valence electron concentration- and N vacancy-induced elasticity in cubic early transition metal nitrides
Soheil Karimi Aghda, Dimitri Bogdanovski, Lukas Loefler +7
Motivated by frequently reported deviations from stoichiometry in cubic transition metal nitride (TMNx) thin films, the effect of N-vacancy concentration on the elastic properties…