98 citations · 516 across the 25 of their papers we have counts for
12 papers · 1 filter
Towards 4D modelisation of thermal-field emission from semiconductors
Salvador Barranco Cárceles, Aquila Mavalankar, Veronika Zadin +2
The theoretical picture of thermal field-emission (TFE) from semiconductors has been limited to 1D and 2D models. This can be attributed to the complex and interdependent phenomena…
Theory and computation of thermal-field emission from semiconductors
Salvador Barranco Cárceles, Veronika Zadin, Aquila Mavalankar +2
Semiconducting field emitters present some interesting features (e.g.; self-limited electron emission) for both scientific interest and industrial applications. The analysis of exp…
In-situ observation of field-induced nano-protrusion growth on a carbon-coated tungsten nanotip
Guodong Meng, Yimeng Li, Roni Aleksi Koitermaa +3
Nano-protrusion (NP) on metal surface and its inevitable contamination layer under high electric field is often considered as the primary precursor that leads to vacuum breakdown,…
Nano1D: An accurate Computer Vision software for analysis and segmentation of low-dimensional nanostructures
Ehsan Moradpur-Tari, Sergei Vlassov, Sven Oras +5
Nanoparticles in microscopy images are usually analyzed qualitatively or manually and there is a need for autonomous quantitative analysis of these objects. In this paper, we prese…
Biased self-diffusion on Cu surface due to electric field gradients
Jyri Kimari, Ye Wang, Andreas Kyritsakis +2
Under strong electric fields, an arc of strong current flowing through plasma can link two metal surfaces even in ultra high vacuum. Despite decades of research, the chain of event…
Polarization characteristics of adatoms self-diffusing on metal surfaces under high electric fields
Ekaterina Baibuz, Andreas Kyritsakis, Ville Jansson +1
Although atomic diffusion on metal surfaces under high electric fields has been studied theoretically and experimentally since the 1970s, its accurate and quantitative theoretical…
Electron cascades and secondary electron emission in graphene under energetic ion irradiation
Henrique Vázquez, Alina Kononov, Andreas Kyritsakis +3
Highly energetic ions traversing a two-dimensional material such as graphene produce strong electronic excitations. Electrons excited to energy states above the work function can g…
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…
Atomistic behavior of metal surfaces under high electric fields
Andreas Kyritsakis, Ekaterina Baibuz, Ville Jansson +1
Combining classical electrodynamics and density functional theory (DFT) calculations, we develop a general and rigorous theoretical framework that describes the energetics of metal…
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…
Adatom diffusion in high electric fields
Ville Jansson, Ekaterina Baibuz, Andreas Kyritsakis +1
Strong electric fields are known to create biased adatom migration on metallic surfaces. We present a Kinetic Monte Carlo model that can simulate adatom migration on a tungsten (W)…