Excited state spectroscopy in carbon nanotube double quantum dots

Abstract

We report on low temperature measurements in a fully tunable carbon nanotube double quantum dot. A new fabrication technique has been used for the top-gates in order to avoid covering the whole nanotube with an oxide layer as in previous experiments. The top-gates allow us to form single dots, control the coupling between them and we observe four-fold shell filling. We perform inelastic transport spectroscopy via the excited states in the double quantum dot, a necessary step towards the implementation of new microwave-based experiments.

16 pages, 6 figures, submitted to nanoletters

References in corpus (5)

• Single-shot read-out of an individual electron spin in a quantum dot
• Single-shot readout of electron spin states in a quantum dot using spin-dependent tunnel rates
• Tunneling in suspended carbon nanotubes assisted by longitudinal phonons
• Four-electron shell structures and an interacting two-electron system in carbon nanotube quantum dots
• Electronic excitation spectrum of metallic carbon nanotubes

Cited by in corpus (21)

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• Effects of different geometries on the conductance, shot noise and tunnel magnetoresistance of double quantum dots
• A triple quantum dot in a single wall carbon nanotube
• Pauli spin blockade in carbon nanotube double quantum dots
• Measurement, control, and decay of quantum-dot spins
• Josephson current through a Kondo molecule
• Singlet-Triplet Physics and Shell Filling in Carbon Nanotube Double Quantum Dots
• Quantum versus classical hyperfine-induced dynamics in a quantum dot
• Failure of standard approximations of the exchange coupling in nanostructures
• Single wall carbon nanotube double quantum dot
• Nonthermal broadening in the conductance of double quantum dot structures
• Real Time Electron Tunneling and Pulse Spectroscopy in Carbon Nanotube Quantum Dots
• Spin-polarized transport through weakly coupled double quantum dots in the Coulomb-blockade regime
• Kondo Physics and Exact Solvability of Double Dots Systems
• Controlled fabrication of single electron transistors from single-walled carbon nanotubes
• Transport Properties of Multiple Quantum Dots Arranged in Parallel: Results from the Bethe Ansatz
• Theory of spin qubits in nanostructures
• Mapping electron delocalization by charge transport spectroscopy in an artificial molecule