Simulation of phonon-assisted band-to-band tunneling in carbon nanotube field-effect transistors

Simulation of Phonon-Assisted Band-to Band Tunneling in Carbon Nanotube Field-Effect Transistors

Band-to-band tunneling in carbon nanotube field-effect transistors.

A detailed study on the mechanism of band-to-band tunneling in carbon nanotube field-effect transistors (CNFETs) is presented. Through a dual-gated CNFET structure tunneling currents from the valence into the conduction band and vice versa can be enabled or disabled by changing the gate potential. Different from a conventional device where the Fermi distribution ultimately limits the gate volta...

Band Engineering of Partially Exposed Carbon Nanotube Field - Effect Transistors

Submitted for the MAR05 Meeting of The American Physical Society Band Engineering of Partially Exposed Carbon Nanotube FieldEffect Transistors XIAOLEI LIU, ZHICHENG LUO, SONG HAN, TAO TANG, DAIHUA ZHANG, CHONGWU ZHOU, University of Southern California — We present a new approach to engineer the band structure of carbon nanotube fieldeffect transistors via selected area chemical gating. By expos...

Band bending engineering in p-i-n gate all around Carbon nanotube field effect transistors by multi-segment gate

The p-i-n carbon nanotube (CNT) devices suffer from low ON/OFF current ratio and small saturation current. In this paper by band bending engineering, we improved the device performance of p-i-n CNT field effect transistors (CNTFET). A triple gate all around structure is proposed to manage the carrier transport along the channel. We called this structure multi-segment gate (MSG) CNTFET. Band to ...

Role of phonon scattering in carbon nanotube field-effect transistors

The role of phonon scattering in carbon nanotube field-effect transistors sCNTFETsd is explored by solving the Boltzmann transport equation using the Monte Carlo method. The results show that elastic scattering in a short-channel CNTFET has a small effect on the source-drain current due to the long elastic mean-free path smfpd s,1 mmd. If elastic scattering with a short mfp were to exist in a C...