98 citations · 457 across the 16 of their papers we have counts for
16 papers
Growth mechanism for nanotips in high electric fields
Ville Jansson, Ekaterina Baibuz, Andreas Kyritsakis +5
In this work we show using atomistic simulations that the biased diffusion in high electric field gradients creates a mechanism whereby nanotips may start growing from small surfac…
Tungsten migration energy barriers for surface diffusion: a parameterization for KMC simulations
Ville Jansson, Andreas Kyritsakis, Simon Vigonski +4
We have calculated the migration barriers for surface diffusion on Tungsten. Our results form a self-sufficient parameterization for Kinetic Monte Carlo simulations of arbitrarily…
Ab Initio calculation of field emission from metal surfaces with atomic--scale defects
Heikki Toijala, Kristjan Eimre, Andreas Kyritsakis +2
In this work we combine density functional theory and quantum transport calculations to study the influence of atomic--scale defects on the work function and field emission charact…
Dynamic coupling between particle-in-cell and atomistic simulations
Mihkel Veske, Andreas Kyritsakis, Kyrre Ness Sjobak +3
We propose a method to directly couple molecular dynamics, finite element method and particle-in-cell techniques to simulate metal surface response to high electric fields. We use…
The Compact Linear ee Collider (CLIC): Physics Potential
P. Roloff, R. Franceschini, U. Schnoor +1
The Compact Linear Collider, CLIC, is a proposed ee collider at the TeV scale whose physics potential ranges from high-precision measurements to extensive direct sensitivit…
Data sets and trained neural networks for Cu migration barriers
Jyri Kimari, Ville Jansson, Simon Vigonski +4
Kinetic Monte Carlo (KMC) is an efficient method for studying diffusion. A limiting factor to the accuracy of KMC is the number of different migration events allowed in the simulat…
Molecular dynamics simulations of surface modification formations on polycrystalline Cu under high electric fields
Kristian Kuppart, Simon Vigonski, Alvo Aabloo +2
Vacuum breakdowns in particle accelerators and other devices operating at high electric fields is a common problem in the operation of these devices. It has been proposed that the…
Thermal runaway of metal nano-tips during intense electron emission
A. Kyritsakis, M. Veske, K. Eimre +2
When an electron emitting tip is subjected to very high electric fields, plasma forms even under ultra high vacuum conditions. This phenomenon, known as vacuum arc, causes catastro…
Au nanowire junction breakup through surface atom diffusion
Simon Vigonski, Ville Jansson, Sergei Vlassov +6
Metallic nanowires are known to break into shorter fragments due to the Rayleigh instability mechanism. This process is strongly accelerated at elevated temperatures and can comple…
Simulations of surface stress effects in nanoscale single crystals
Vahur Zadin, Mihkel Veske, Simon Vigonski +5
Onset of vacuum arcing near a metal surface is often associated with nanoscale asperities, which may dynamically appear due to different processes ongoing in the surface and subsur…
Cu self-sputtering MD simulations for 0.1-5 keV ions at elevated temperatures
Tarvo Metspalu, Ville Jansson, Vahur Zadin +4
Self-sputtering of copper under high electric fields is considered to contribute to plasma buildup during a vacuum breakdown event frequently observed near metal surfaces, even in…
Migration barriers for surface diffusion on a rigid lattice: challenges and solutions
Ekaterina Baibuz, Simon Vigonski, Jyri Lahtinen +4
Atomistic rigid lattice Kinetic Monte Carlo is an efficient method for simulating nano-objects and surfaces at timescales much longer than those accessible by molecular dynamics. A…
Dynamic coupling of a finite element solver to large-scale atomistic simulations
Mihkel Veske, Andreas Kyritsakis, Kristjan Eimre +3
We propose a method for efficiently coupling the finite element method with atomistic simulations, while using molecular dynamics or kinetic Monte Carlo techniques. Our method can…
Updated baseline for a staged Compact Linear Collider
The CLIC, CLICdp collaborations, : +515
The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e+e- collider under development. For an optimal exploitation of its physics potential, CLIC is foreseen to…
Laser-induced asymmetric faceting and growth of nano-protrusion on a tungsten tip
Hirofumi Yanagisawa, Vahur Zadin, Karsten Kunze +7
Irradiation of a sharp tungsten tip by a femtosecond laser and exposed to a strong DC electric field led to gradual and reproducible surface modifications. By a combination of fiel…
Electrodynamics - molecular dynamics simulations of the stability of Cu nanotips under high electric field
Mihkel Veske, Stefan Parviainen, Vahur Zadin +2
The shape memory effect and pseudoelasticity in Cu nanowires is one possible pair of mechanisms that prevents high aspect ratio nanosized field electron emitters to be stable at ro…