Four-Electron Shell Structures and an Interacting Two-Electron System in Carbon-Nanotube Quantum Dots

2004/11/30 by S. Moriyama, Satoshi Moriyama, T. Fuse +5 · 3 citations
Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #Graphene research and applications #Quantum and electron transport phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.94.186806

published as Physical Review Letters, 94, 186806 (2005). · 4 pages, 3 figures, submitted to Physical Review Letters

arxiv created 2005/02/07 · openalex publication_date 2005/05/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

Low-temperature transport measurements have been carried out on single-wall carbon-nanotube quantum dots in a weakly coupled regime in magnetic fields. Four-electron shell filling was observed, and the magnetic field evolution of each Coulomb peak was investigated. 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 Hund's rule.

Citations

• Modern quantum mechanics

Cited by

• Gate-dependent spin-orbit coupling in multi-electron carbon nanotubes
• Discrete states and ballistic interference in quantum wires approaching macroscopic lengths
• Linear and nonlinear transport across carbon nanotube quantum dots

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• Electronic Transport Spectroscopy of Carbon Nanotubes in a Magnetic Field
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• Kondo effect in carbon nanotube quantum dot in a magnetic field