90 citations · 326 across the 10 of their papers we have counts for
10 papers
Spin-Strain Phase Diagram of Defective Graphene
E. J. G. Santos, S. Riikonen, D. Sanchez-Portal +1
Using calculations on defective graphene from first principles, we herein consider the dependence of the properties of the monovacancy of graphene under isotropic strain, with a pa…
Sub-monolayers of carbon on alpha-iron facets: an ab-initio study
S. Riikonen, A. V. Krasheninnikov, R. M. Nieminen
Motivated by recent in situ studies of carbon nanotube growth from large transition-metal nanoparticles, we study various alpha-iron (ferrite) facets at different carbon concentrat…
Computational study of boron nitride nanotube synthesis: how catalyst morphology stabilizes the boron nitride bond
S. Riikonen, A. S. Foster, A. V. Krasheninnikov +1
In an attempt to understand why catalytic methods for the growth of boron nitride nanotubes work much worse than for their carbon counterparts, we use first-principles calculations…
Systematic investigation of the structure of the Si(553)-Au surface from first principles
Sampsa Riikonen, Daniel Sanchez-Portal
We present here a comprehensive search for the structure of the Si(553)-Au reconstruction. More than two hundred different trial structures have been studied using first-principles…
Plasmon tunability in metallodielectric metamaterials
S. Riikonen, I. Romero, F. J. Garcia de Abajo
The dielectric properties of metamaterials consisting of periodically arranged metallic nanoparticles of spherical shape are calculated by rigorously solving Maxwell's equations. E…
Ab initio study of the double row model of the Si(553)-Au reconstruction
Sampsa Riikonen, Daniel Sanchez-Portal
Using x-ray diffraction Ghose et al. [Surf. Sci. {\bf 581} (2005) 199] have recently produced a structural model for the quantum-wire surface Si(553)-Au. This model presents two pa…