250 citations · 256 across the 3 of their papers we have counts for
10 papers
The Interlayer Shear Modes in Twisted Multi-layer Graphenes: Interlayer coupling, Davydov Splitting and Intensity Resonance
Jiang-Bin Wu, Xin Zhang, Mari Ijas +6
Graphene and other two-dimensional crystals can be combined to form various hybrids and heterostructures, creating materials on demand, in which the interlayer coupling at the inte…
Doping dependence of the Raman spectrum of defected graphene
M. Bruna, A. K. Ott, M. Ijas +3
We investigate the evolution of the Raman spectrum of defected graphene as a function of doping. Polymer electrolyte gating allows us to move the Fermi level up to 0.7eV, as monito…
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…
Interaction of chlorine with Stone-Wales de- fects in graphene and carbon nanotubes, and thermodynamical prospects of chlorine-induced nanotube unzipping
M. Ijäs, P. Havu, A. Harju
We study the binding of chlorine atoms to carbon nanotubes and graphene at a Stone-Wales defect and to the sidewalls of pristine nanotubes. We show using ab initio thermodynamics t…
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…
Fractional periodicity of persistent current in coupled quantum rings
M. Ijäs, A. Harju
We study the transmission properties of a few-site Hubbard rings with up to second-nearest neighbor coupling embedded to a ring-shaped lead using exact diagonalization. The approac…