Four-electron shell structures and an interacting two-electron system in carbon nanotube quantum dots
arXiv:cond-mat/0411254 · doi:10.1103/PhysRevLett.94.186806
Abstract
Low-temperature transport measurements have been carried out on single-wall carbon nanotube quantum dots in a weakly coupled regime in magnetic fields up to 8 Tesla. Four-electron shell filling was observed, and the magnetic field evolution of each Coulomb peak was investigated, in which magnetic field induced spin flip and resulting spin polarization were observed. Excitation spectroscopy measurements have revealed Zeeman splitting of single particle states for one electron in the shell, and demonstrated singlet and triplet states with direct observation of the exchange splitting at zero-magnetic field for two electrons in the shell, the simplest example of the Hund's rule. The latter indicates the direct analogy to an artificial He atom.
4 pages, 3 figures, submitted to Physical Review Letters
References in corpus (4)
Cited by in corpus (42)
- Coupling of Spin and Orbital Motion of Electrons in Carbon Nanotubes
- Graphene Nanoribbons with Smooth Edges Behave as Quantum Wires
- The Fock-Darwin States of Dirac Electrons in Graphene-based Artificial Atoms
- Spin States in Graphene Quantum Dots
- Nanospintronics with carbon nanotubes
- Evolution of SU(4) Transport Regimes in Carbon Nanotube Quantum Dots
- Carbon nanotubes for coherent spintronic devices
- Shot noise in carbon nanotube based Fabry-Perot interferometers
- Excited state spectroscopy in carbon nanotube double quantum dots
- Coulomb blockade in electron transport through a C molecule from first principles
- Coulomb versus spin-orbit interaction in few-electron carbon-nanotube quantum dots
- Magnetoresistance of a quantum dot with spin-active interfaces
- Few-electron physics in a nanotube quantum dot with spin-orbit coupling
- Singlet-Triplet Physics and Shell Filling in Carbon Nanotube Double Quantum Dots
- Angular momentum and topology in semiconducting single-wall carbon nanotubes
- Linear and nonlinear transport across carbon nanotube quantum dots
- Transport mirages in single-molecule devices
- Persistent Orbital Degeneracy in Carbon Nanotubes
- Spin transport across carbon nanotube quantum dots
- Conductance via Multi orbital Kondo Effect in Single Quantum Dot
- The low energy spectrum of finite size metallic SWNTs
- The spectrum of interacting metallic carbon nanotubes: Exchange effects and universality
- Valley coupling in finite-length metallic single-wall carbon nanotubes
- Non-Fermi liquid behavior in transport across carbon nanotube quantum dots
- Field-induced Confined States in Graphene
- Tight-binding simulations of electrically driven spin-valley transitions in carbon nanotube quantum dots
- Double Quantum Dots in Carbon Nanotubes
- Singlet-triplet filtering and entanglement in a quantum dot structure
- Exchange effects in spin polarized transport through carbon nanotube quantum dots
- Kramers polarization in strongly correlated carbon nanotube quantum dots
- Field-Enhanced Kondo Correlations in a Half-Filling Nanotube Dot: Evolution of an SU(N) Fermi-Liquid Fixed Point
- Spin and Orbital Splitting in Ferromagnetic Contacted Single Wall Carbon Nanotube Devices
- Nanoscale magnetic resonance spectroscopy using a carbon nanotube double quantum dot
- Three-orbital Kondo effect in single quantum dot system with plural electrons
- Bipolaronic blockade effect in quantum dots with negative charging energy
- Linear conductance of an interacting carbon nanotube ring
- Transport properties of double-walled carbon nanotube quantum dots
- Spin effects in single-electron transport through carbon nanotube quantum dots
- Multi-terminal spin-dependent transport in ballistic carbon nanotubes
- Spin pairs in a weakly coupled many-electron quantum dot
- Hund and pair-hopping signature in transport properties of degenerate nanoscale devices
- Gate-dependent spin-orbit coupling in multi-electron carbon nanotubes