2009/03/19 by P. H. Rivera, A. L. C. Pereira, P. A. Schulz · 16 citations
Chemistry · Materials Science · Physics and Astronomy · #Anisotropy #Chemistry #Condensed matter physics #Field (mathematics) #Floquet theory #Graphene #Graphene quantum dot #Graphene research and applications #Magnetic field #Photon #Physics #Polarization (electrochemistry) #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum optics and atomic interactions #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.79.205406
published in Physical Review B 79(20) (American Physical Society) · 6 pages, 6 figures
arxiv created 2009/03/19 · openalex publication_date 2009/05/08 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A graphene quantum dot under intense ac field and static low magnetic field is investigated. From a tight-binding perspective, applying a Fourier-Floquet transformation and renormalization process, we observe that graphene---intrinsically anisotropic---reveals field polarization signatures in the quasidensity of states. For the ac field polarized along the armchair direction, the dressed electronic structure shows an emergent property: an ac-field-induced quantum ring. This is inferred by the orientation-dependent formation of a miniband of energy states periodically modulated with increasing magnetic field, exactly analogous to the behavior of a quantum-ring spectrum.