Condensed Matter Physics Seminar

Special Time and Place!
1:15 p.m., Thursday, Tuesday, January 27, 2004
Room 1116, IPST Building

Local Gate Control Carbon Nanotube Quantum Dots

Nadya Mason

(Harvard University)

Abstract: Detailed studies of carbon nanotube physics and devices require independent control of nanotube parameters. It is particularly important to control electron confinement (quantum dot) effects for applications such as quantum computation. In this talk, I will show how we achieve independent control of nanotube parameters via multiple electrostatic gates. I will focus on the fabrication and measurement of a nanotube-based double quantum dot. Transport measurements of the double-dot device reveal honeycomb charge stability diagrams as a function of two nearly independent gate voltages. Local gates are used to manipulate and study single-electron charging effects as well as charge interactions. I will also show how mechanically fabricated defects can be locally gated to control conductance through a nanotube device.

Host: Fuhrer
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