Multiple Functionality in Nanotube Transistors

Details Multiple Functionality in Nanotube Transistors Multiple Functionality in Nanotube Transistors

2002-05-21

arxiv.org/abs/cond-mat/0205445v1

Physics

Condensed Matter

To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.88.258302

Calculations of quantum transport in a carbon nanotube transistor show that such a device offers unique functionality. It can operate as a ballistic field-effect transistor, with excellent characteristics even when scaled to 10 nm dimensions. At larger gate voltages, channel inversion leads to resonant tunneling through an electrostatically defined nanoscale quantum dot. Thus the transistor becomes a gated resonant tunelling device, with negative differential resistance at a tunable threshold. For the dimensions considered here, the device operates in the Coulomb blockade regime, even at room temperature.

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