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Suppression of tunneling into multiwall carbon nanotubes
A Bachtold1, M de Jonge, K Grove-Rasmussen
1Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.
Physical Review Letters
|November 3, 2001
Abstract:
We have studied tunneling of electrons into multiwall carbon nanotubes (NTs) in NT-gold and NT-NT junctions, the latter created by atomic force microscope manipulation. The tunneling conductance goes to zero as the energy (temperature and bias) is reduced, and the functional form is consistent with a power law. The exponents depend upon sample geometry. The relationship between these results and theories for tunneling into ballistic and disordered metals is discussed.