Addition Energies of Fullerenes and Nanotubes as Quantum Dots: The Role of Symmetry
arXiv:cond-mat/0301175 · doi:10.1103/PhysRevLett.91.116803
Abstract
Using density-functional theory calculations, we investigate the addition energy (AE) of quantum dots formed of fullerenes or closed single-wall carbon nanotubes. We focus on the connection between symmetry and oscillations in the AE spectrum. In the highly symmetric fullerenes the oscillation period is large because of the large level degeneracy and Hund's rule. For long nanotubes, the AE oscillation is fourfold. Adding defects destroys the spatial symmetry of the tubes, leaving only spin degeneracy; correspondingly, the fourfold behavior is destroyed, leaving an even/odd behavior which is quite robust. We use our symmetry results to explain recent experiments. [Phys. Rev. Lett. 91, 116803 (2003).]
arXiv comment4 pages, 5 figures
References in corpus (11)
- The Statistical Theory of Quantum Dots
- Spectroscopy of discrete energy levels in ultrasmall metallic grains
- Spin splitting and even-odd effects in carbon nanotubes
- Multi-wall carbon nanotubes as quantum dots
- Shell filling in closed single-wall carbon nanotube quantum dots
- Spin configurations of carbon nanotube in a nonuniform external potential
- Interactions in Chaotic Nanoparticles: Fluctuations in Coulomb Blockade Peak Spacings
- Spin and Conductance-Peak-Spacing Distributions in Large Quantum Dots: A Density Functional Theory Study
- Coulomb Blockade Peak Spacing Distribution: The Interplay of Temperature and Spin
- Ground-state energy and spin in disordered quantum dots
- Density functional theory of spin-polarized disordered quantum dots
Cited by in corpus (7)
- The Fock-Darwin States of Dirac Electrons in Graphene-based Artificial Atoms
- Resonant low-energy electron scattering on short-range impurities in graphene
- Applying Adaptive Time-Dependent DMRG to Calculate the Conductance of Strongly Correlated Nanostructures
- Linear and nonlinear transport across carbon nanotube quantum dots
- Persistent Orbital Degeneracy in Carbon Nanotubes
- Degeneracy breaking and intervalley scattering due to short-ranged impurities in finite single-wall carbon nanotubes
- Non-Fermi liquid behavior in transport across carbon nanotube quantum dots