Shell Filling in Closed Single-Wall Carbon Nanotube Quantum Dots

2001/12/18 by David Cobden, David H. Cobden, Jesper Nygård +1 · 5 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.89.046803

4 pages including 4 figures

arxiv created 2001/12/18 · openalex publication_date 2002/07/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We observe twofold shell filling in the spectra of closed one-dimensional quantum dots formed in single-wall carbon nanotubes. Its signatures include a bimodal distribution of addition energies, correlations in the excitation spectra for different electron number, and alternation of the spins of the added electrons. This provides a contrast with quantum dots in higher dimensions, where such spin pairing is absent. We also see indications of an additional fourfold periodicity indicative of K-K' subband shells. Our results suggest that the absence of shell filling in most isolated nanotube dots results from disorder or nonuniformity.

Citations

• Carbon Nanotubes as Molecular Quantum Wires
• Spin Splitting and Even-Odd Effects in Carbon Nanotubes

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