113 citations · 306 across the 7 of their papers we have counts for
7 papers
Self-consistent energy approximation for orbital-free density-functional theory
E. Rasanen, A. Odriazola, I. Makkonen +1
Employing a local formula for the electron-electron interaction energy, we derive a self-consistent approximation for the total energy of a general -electron system. Our scheme…
Electronic states in finite graphene nanoribbons: Effect of charging and defects
M. Ijäs, M. Ervasti, A. Uppstu +4
We study the electronic structure of finite armchair graphene nanoribbons using density-functional theory and the Hubbard model, concentrating on the states localized at the zigzag…
High-temperature surface superconductivity in rhombohedral graphite
N. B. Kopnin, M. Ijäs, A. Harju +1
Surface superconductivity in rhombohedral graphite is a robust phenomenon which can exist even when higher order hoppings between the layers lift the topological protection of the…
Hydrogenated graphene on the silicon dioxide surface
P. Havu, M. Ijäs, A. Harju
Hydrogenation of graphene on the α-quartz (0001) SiO_2 substrate is studied, considering different surface terminations in order to take into account the amorphic nature of the mat…
Lattice density-functional theory on graphene
M. Ijäs, A. Harju
A density-functional approach on the hexagonal graphene lattice is developed using an exact numerical solution to the Hubbard model as the reference system. Both nearest-neighbour…
Optimal confinement potential in quantum Hall droplets
E. Tölö, A. Harju
We find that the confinement potential of a few electron quantum dot can be tuned to significantly increase the overlap with certain quantum Hall trial wave functions. Besides mani…