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6 papers · 2 filters
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…
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…
Bloch line dynamics within moving domain walls in 3D ferromagnets
Touko Herranen, Lasse Laurson
We study field-driven magnetic domain wall dynamics in garnet strips by large-scale three-dimensional micromagnetic simulations. The domain wall propagation velocity as a function…
Local segregation versus irradiation effects in high-entropy alloys: Steady-state conditions in a driven system
Leonie Koch, Fredric Granberg, Tobias Brink +4
We study order transitions and defect formation in a model high-entropy alloy (CuNiCoFe) under ion irradiation by means of molecular dynamics simulations. Using a hybrid Monte-Carl…