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Condensed Matter Seminars
| Special Condensed Matter
Monday, March 26, 2001
Physics Building, Room 204
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[Host: Despina Louca]
Univ. of Warwick
"Carbon nanotube quantum wires and quantum dots"
Recent experiments on transport through individual single-wall carbon
nanotubes with electrical contacts have shown that a broad range of physical
phenonema can occur in such molecular-electronic devices [1,2]. I will
review our present understanding of metallic nanotubes as interacting
quantum wires and dots, with more emphasis on the quantum dot regime. As a
result of the one-dimensional (1D) band structure, the spectral
characteristics of nanotube dots are in informative contrast with those of
dots formed in other systems having 2D or 3D bands. Also, these 1D quantum
dots are preserved, effectively floating in vacuum, when the substrate
beneath the tubes is etched away. In the resulting tightrope geometry we
can begin to study the interplay of the molecule's electronic properties
with a wide range of environmental factors. Finally, having achieved
surprisingly good electrical contacts between the metal leads and tubes, we
find that nanotube dots prove to be an excellent system for studying new
aspects of Kondo physics.
 Cees Dekker, "Carbon Nanotubes as Molecular Quantum Wires". Physics
Today 52, 22-28 (1999).
 Paul McEuen and others, Special reports in Physics World vol 13 issue 6
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