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Suppression of Tunneling into Multiwall Carbon Nanotubes

2001; American Physical Society; Volume: 87; Issue: 16 Linguagem: Inglês

10.1103/physrevlett.87.166801

1092-0145

Adrian Bachtold, Mark de Jonge, Kasper Grove‐Rasmussen, Paul L. McEuen, M. R. Buitelaar, Christian Schönenberger,

Diamond and Carbon-based Materials Research

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.