2014/04/18 by A. Pieper, Andreas Pieper, R. L. Heinisch +4 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Bound state #Carbon and Quantum Dots Applications #Condensed matter physics #Graphene #Graphene and Nanomaterials Applications #Graphene quantum dot #Graphene research and applications #Materials science #Physics #Quantum dot #Quantum mechanics #Superlattice #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.89.165121
published as Physical Review B 89, 165121 (2014) · 6 pages, 9 figures, minor corrections
openalex publication_date 2014/04/18 · arxiv created 2014/04/19 · arxiv updated 2015/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider a square lattice configuration of circular gate-defined quantum dots in an unbiased graphene sheet and calculate the electronic, particularly spectral properties of finite albeit actual sample sized systems by means of a numerically exact kernel polynomial expansion technique. Analyzing the local density of states and the momentum resolved photoemission spectrum we find clear evidence for a series of quasibound states at the dots, which can be probed by optical measurements. We further analyze the interplay of the superlattice structure with dot-localized modes on the electron energy dispersion. Effects of disordered dot lattices are discussed too.