90 citations · 326 across the 10 of their papers we have counts for
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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…
Metal-insulator transition in the In/Si(111) surface
Sampsa Riikonen, Andres Ayuela, Daniel Sanchez-Portal
The metal-insulator transition observed in the In/Si(111)-4x1 reconstruction is studied by means of ab initio calculations of a simplified model of the surface. Different surface b…
First-principles study of the atomic and electronic structure of the Si(111)-(5x2-Au surface reconstruction
Sampsa Riikonen, Daniel Sanchez-Portal
We present a systematic study of the atomic and electronic structure of the Si(111)-(5x2)-Au reconstruction using first-principles electronic structure calculations based on the de…
Structural models for the Si(553)-Au atomic chain reconstruction
Sampsa Riikonen, Daniel Sanchez-Portal
Recent photoemission experiments on the Si(553)-Au reconstruction show a one-dimensional band with a peculiar ~1/4 filling. This band could provide an opportunity for observing lar…
Role of the spin-orbit splitting and the dynamical fluctuations in the Si(557)-Au surface
Daniel Sanchez-Portal, Sampsa Riikonen, Richard M. MArtin
Our it ab initio calculations show that spin-orbit coupling is crucial to understand the electronic structure of the Si(557)-Au surface. The spin-orbit splitting produces the two o…