Spin effects in single-electron transport through carbon nanotube quantum dots
arXiv:0704.3505 · doi:10.1103/PhysRevB.76.045102
Abstract
We investigate the total spin in an individual single-wall carbon nanotube quantum dot with various numbers of electrons in a shell by using the ratio of the saturation currents of the first steps of Coulomb staircases for positive and negative biases. The current ratio reflects the total-spin transition that is increased or decreased when the dot is connected to strongly asymmetric tunnel barriers. Our results indicate that total spin states with and without magnetic fields can be traced by this method.
5pages, 5figures, accepted for publication in Phys. Rev. B
References in corpus (6)
- Orbital Kondo effect in carbon nanotubes
- Shell filling in closed single-wall carbon nanotube quantum dots
- Four-electron shell structures and an interacting two-electron system in carbon nanotube quantum dots
- Electronic excitation spectrum of metallic carbon nanotubes
- On the Kondo effect in carbon nanotubes at half halfing
- Persistent Orbital Degeneracy in Carbon Nanotubes