Formation of a quantum dot in a single-walled carbon nanotube using the Al top-gates

J. W. Park, J. B. Choi, K. H. Yoo

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


We have fabricated gate-controlled carbon-nanotube single-electron devices by utilizing the line-shaped Al top-gates. A quantum dot is formed in the single-walled carbon nanotube between two Al top-gates fabricated using the electron-beam lithography technique. The deposited top-gates flatten the single-walled carbon nanotube locally and the deformed regions play the role of tunneling barrier, whose potential is controlled by the top-gates. We have also investigated the temperature dependence of the conductance G for the devices with the Al top-gates. The power-law dependence, G∝Tα, is observed at high temperatures. However, the exponent α increases as the barrier potential is enhanced.

Original languageEnglish
Pages (from-to)2644-2646
Number of pages3
JournalApplied Physics Letters
Issue number14
Publication statusPublished - 2002 Sept 30

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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