238 citations · 334 across the 4 of their papers we have counts for
4 papers
Magnetism and d-wave superconductivity on the half-filled square lattice with frustration
Andriy H. Nevidomskyy, Christian Scheiber, David Senechal +1
The role of frustration and interaction strength on the half-filled Hubbard model is studied on the square lattice with nearest and next-nearest neighbour hoppings t and t' using t…
Convexity of the self-energy functional in the variational cluster approximation
Andriy H. Nevidomskyy, David Sénéchal, A. -M. S. Tremblay
In the variational cluster approximation (VCA) (or variational cluster perturbation theory), widely used to study the Hubbard model, a fundamental problem that renders variational…
Coexistence of ferromagnetism and superconductivity near quantum phase transition: The Heisenberg- to Ising-type crossover
Andriy H. Nevidomskyy
A microscopic mean-field theory of the phase coexistence between ferromagnetism and superconductivity in the weakly ferromagnetic itinerant electron system is constructed, while in…
Chemically active substitutional nitrogen impurity in carbon nanotubes
Andriy H. Nevidomskyy, Gábor Csányi, Michael C. Payne
We investigate the nitrogen substitutional impurity in semiconducting zigzag and metallic armchair single-wall carbon nanotubes using ab initio density functional theory. At low co…