Molecular states in carbon nanotube double quantum dots

Abstract

We report electrical transport measurements through a semiconducting single-walled carbon nanotube (SWNT) with three additional top-gates. At low temperatures the system acts as a double quantum dot with large inter-dot tunnel coupling allowing for the observation of tunnel-coupled molecular states extending over the whole double-dot system. We precisely extract the tunnel coupling and identify the molecular states by the sequential-tunneling line shape of the resonances in differential conductance.

5 pages, 4 figures

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• Hyperfine interaction and electron-spin decoherence in graphene and carbon nanotube quantum dots
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• Carbon nanotubes for coherent spintronic devices
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• A triple quantum dot in a single wall carbon nanotube
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• Spin-valley blockade in carbon nanotube double quantum dots
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• Stationary and transient leakage current in the Pauli spin blockade
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• Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
• Negative tunnel magnetoresistance and differential conductance in transport through double quantum dots
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• Josephson current through a Kondo molecule
• Singlet-Triplet Physics and Shell Filling in Carbon Nanotube Double Quantum Dots
• Local Spin Susceptibilities of Low-Dimensional Electron Systems
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• Transport mirages in single-molecule devices
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• Nonthermal broadening in the conductance of double quantum dot structures
• Spin filtering and entanglement detection due to spin-orbit interaction in carbon nanotube cross-junctions
• Spin-orbital and spin Kondo effects in parallel coupled quantum dots
• Spin-polarized transport through weakly coupled double quantum dots in the Coulomb-blockade regime
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• Spin-dependent electronic hybridization in a rope of carbon nanotubes
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• Multi-terminal spin-dependent transport in ballistic carbon nanotubes
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• Polaronic Entanglement of Quantum dot Molecule in a voltage-controlled junction