Gate-Defined Quantum Dots on Carbon Nanotubes

Details Gate-Defined Quantum Dots on Carbon Nanotubes Gate-Defined Quantum Dots on Carbon Nanotubes

2005-02-26

arxiv.org/abs/cond-mat/0502634v2

Nano Letters 5, 1267 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

related papers at http://marcuslab.harvard.edu

Scientific paper

We report the realization of nanotube-based quantum dot structures that use local electrostatic gating to produce individually controllable dots in series along a nanotube. Electrostatic top-gates produce depletion regions in the underlying tube; a pair of such depletion regions defines a quantum dot. Transparencies of tunnel barriers as well as the electrostatic energies, within single and multiple dots, can be tuned by gate voltages. The approach allows accurate control over multiple devices on a single tube, and serves as a design paradigm for nanotube-based electronics and quantum systems.

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