2018/06/26 by B. Szafran, Dariusz Żebrowski, D. Zebrowski
Materials Science · Physics and Astronomy · #Antibonding molecular orbital #Atomic orbital #Condensed matter physics #Electron #Graphene #Graphene research and applications #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Scattering #Silicene #Spin (aerodynamics) #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.98.155305
published as Phys. Rev. B 98, 155305 (2018)
arxiv created 2018/06/26 · openalex created_date 2018/07/10 · openalex publication_date 2018/10/10 · arxiv updated 2018/10/17 · openalex updated_date 2026/08/05
We study quantum dots defined electrostatically in silicene. We determine the spin-valley structure of confined single- and two-electron systems, and quantify the effects of the intervalley scattering by the electron-electron interaction potential and the crystal edge. The double quantum dots are discussed in the context of the spatial symmetry of the extended orbitals. We determine the charge, spin, and valley transitions induced by alternate electric fields. We show that the valley transition times can be changed within several orders of magnitude by tuning the confinement potential and the coupling of the confined states to the edge of the flake. The spin transition rates can be enhanced by orders of magnitude by the coupling of the bonding and antibonding orbitals mediated by the Rashba spin-orbit interaction.