In situ one-step grown Fe/suspended single-wall carbon nanotube/fe junction and their controllable carrier transport properties

Yun-Hi Lee, Jong Hee Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We demonstrated the in situ one-step fabrication of suspended single wall carbon nanotube transistors with Fe/Al bilayered film electrodes for practical integrated quantum phase devices. At 300 K, the devices show field effect transistor operation with an excellent subthreshold swing of S ∼ 90 mV/decade for a long channel of 3 μm, In the low temperature regime, we observed four clear peaks corresponding to the four-fold degeneracy of the quantum energy levels at 3.7 K. These four clear peaks indicated that both of the contacts between the SWNT and Fe/Al are highly transparent and that a high-quality SWNT bridge is formed. The dI/dV characteristics under an applied external magnetic field indicate that the modulation of the bandgap of the nanotube with the oscillation of the conductance can be achieved by varying the magnetic field, due to the quantum interference of the electrons. In summary, the simple one-step grown SWNT junction between Fe electrodes can be utilized as a promising element for integrated quantum electronic devices.

Original languageEnglish
Pages (from-to)578-582
Number of pages5
JournalIEEE Transactions on Nanotechnology
Volume6
Issue number5
DOIs
Publication statusPublished - 2007 Sep 1

Fingerprint

Carrier transport
Transport properties
Carbon nanotubes
Quantum electronics
Magnetic fields
Electrodes
Field effect transistors
Nanotubes
Electron energy levels
Transistors
Energy gap
Modulation
Fabrication
Electrons
Temperature

Keywords

  • Carbon
  • Carbon compounds
  • Semiconductor materials

ASJC Scopus subject areas

  • Engineering(all)
  • Hardware and Architecture

Cite this

In situ one-step grown Fe/suspended single-wall carbon nanotube/fe junction and their controllable carrier transport properties. / Lee, Yun-Hi; Lee, Jong Hee.

In: IEEE Transactions on Nanotechnology, Vol. 6, No. 5, 01.09.2007, p. 578-582.

Research output: Contribution to journalArticle

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