Journal
SCIENCE
Volume 304, Issue 5674, Pages 1132-1134Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1096647
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We report experiments on quantum dot single-electron-tunneling ( SET) transistors made from short multiwall nanotubes and threaded by magnetic flux. Such systems allow us to probe the electronic energy spectrum of the nanotube and its dependence on the magnetic field. Evidence is provided for the interconversion between gapped (semiconducting) and ungapped ( metallic) states. Our tubes exhibit h/e-period magnetic flux dependence, in agreement with simple tight-binding calculations.
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