UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Hybrid continuum–atomistic modelling of swift heavy ion radiation damage in germanium

Daraszewicz, SL; Duffy, DM; (2013) Hybrid continuum–atomistic modelling of swift heavy ion radiation damage in germanium. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 303 , Article C. 10.1016/j.nimb.2012.11.027. Green open access

[img]
Preview
PDF
1398944.pdf
Available under License : See the attached licence file.

Download (1MB)

Abstract

The response of germanium to swift heavy ion irradiation is simulated using a hybrid continuum–atomistic approach. The continuum part of the model, which characterises the electronic excitations is an extension of the inelastic thermal spike based on an approximation to the Boltzmann transport equation; while the atomistic part is represented with molecular dynamics. This integrated method can realistically account for the non-equilibrium carrier dynamics in band-gap materials under irradiation, unlike earlier developments based on the two-temperature approach. The model is used to obtain temporal and spatial evolution of carrier density, electronic temperature and lattice temperature for germanium irradiated with carbon cluster ions. Good agreement with experimental data of amorphised latent track radii for different stopping powers is obtained by fitting a constant value for the electron–phonon coupling strength – the only parameter treated as free in the model.

Type: Article
Title: Hybrid continuum–atomistic modelling of swift heavy ion radiation damage in germanium
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.nimb.2012.11.027
Publisher version: http://dx.doi.org/10.1016/j.nimb.2012.11.027
Language: English
Additional information: This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/1398944
Downloads since deposit
238Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item