Modeling a Schottky-barrier carbon nanotube field-effect transistor with ferromagnetic contacts

Abstract

In this study, a model of a Schottky-barrier carbon nanotube field- effect transistor (CNT-FET), with ferromagnetic contacts, has been developed. The emphasis is put on analysis of current-voltage characteristics as well as shot (and thermal) noise. The method is based on the tight-binding model and the non- equilibrium Green's function technique. The calculations show that, at room temperature, the shot noise of the CNT FET is Poissonian in the sub-threshold region, whereas in elevated gate and drain/source voltage regions the Fano factor gets strongly reduced. Moreover, transport properties strongly depend on relative magnetization orientations in the source and drain contacts. In particular, one observes quite a large tunnel magnetoresistance, whose absolute value may exceed 50%.

8 pages, 4 figures

References in corpus (7)

• Nanospintronics with carbon nanotubes
• Shot Noise with Interaction Effects in Single Walled Carbon Nanotubes
• Magnetoresistance of a quantum dot with spin-active interfaces
• Properties of short channel ballistic carbon nanotube transistors with ohmic contacts
• Quantum kinetic description of Coulomb effects in one-dimensional nano-transistors
• Schottky-barrier double-walled carbon nanotube field-effect transistors
• Theoretical studies of spin-dependent electrical transport through carbon nanotbes