39 citations · 96 across the 5 of their papers we have counts for
5 papers
Many-body effects in porphyrin-like transition metal complexes embedded in graphene
Andrew Allerdt, Hasnain Hafiz, Bernardo Barbiellini +2
We introduce a new computational method to study porphyrin-like transition metal complexes, bridging density functional theory and exact many-body techniques, such as the density m…
Spatial structure of correlations around a quantum impurity at the edge of a two-dimensional topological insulator
Andrew Allerdt, Adrian E. Feiguin, George B. Martins
We calculate exact zero-temperature real space properties of a substitutional magnetic impurity coupled to the edge of a zigzag silicene-like nanoribbon. Using a Lanczos transforma…
Non-perturbative effects and indirect exchange interaction between quantum impurities on metallic (111) surfaces
A. Allerdt, R. Žitko, A. E. Feiguin
The (111) surface of noble metals is usually treated as an isolated two dimensional (2D) triangular lattice completely decoupled from the bulk. However, unlike topological insulato…
Competition between Kondo effect and RKKY physics in graphene magnetism
A. Allerdt, A. E. Feiguin, S. Das Sarma
The cooperative behavior of quantum impurities on 2D materials, such as graphene and bilayer graphene, is characterized by a non-trivial competition between screening (Kondo effect…
Kondo versus indirect exchange: the role of the lattice and the actual range of RKKY interactions in real materials
Andrew Allerdt, C. A. Busser, G. B. Martins +1
Magnetic impurities embedded in a metal interact via an effective Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling mediated by the conduction electrons, which is commonly assumed to b…