Reversible metal-insulator transitions in metallic single-walled carbon nanotubes |
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Authors: | Marquardt Christoph W Dehm Simone Vijayaraghavan Aravind Blatt Sabine Hennrich Frank Krupke Ralph |
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Affiliation: | Forschungszentrum Karlsruhe, Institut fur Nanotechnologie, D-76021 Karlsruhe, Germany, and Physikalisches Institut, Universitat Karlsruhe, D-76128 Karlsruhe, Germany christoph.marquardt@int.fzk.de. |
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Abstract: | We report on reversible metal to insulator transitions in metallic single-walled carbon nanotube devices induced by repeated electron irradiation of a nanotube segment. The transition from a low-resistive, metallic state to a high-resistive, insulating state by 3 orders of magnitude was monitored by electron transport measurements. Application of a large voltage bias leads to a transition back to the original metallic state. Both states are stable in time, and transitions are fully reversible and reproducible. The data is evidence for a local perturbation of the nanotube electronic system by removable trapped charges in the underneath substrate and excludes structural damage of the nanotube. The result has implications for using electron-beam lithography in nanotube device fabrication. |
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