3D quantum mechanical simulation of square nanowire MOSFETs by using NEGF method

• Authors: Esmaeil Dastjerdy , Rahim Ghayour , Hojjat Sarvari
• Languages of publication: EN

Abstracts

EN

In order to investigate the specifications of nanoscale transistors, we have used a three dimensional (3D) quantum mechanical approach to simulate square cross section silicon nanowire (SNW) MOSFETs. A three dimensional simulation of silicon nanowire MOSFET based on self consistent solution of Poisson-Schrödinger equations is implemented. The quantum mechanical transport model of this work uses the non-equilibrium Green’s function (NEGF) formalism. First, we simulate a double-gate (DG) silicon nanowire MOSFET and compare the results with those obtained from nanoMOS simulation. We understand that when the transverse dimension of a DG nanowire is reduced to a few nanometers, quantum confinement in that direction becomes important and 3D Schrödinger equation must be solved. Second, we simulate gate-all-around (GAA) silicon nanowire MOSFETs with different shapes of gate. We have investigated GAA-SNW-MOSFET with an octagonal gate around the wire and found out it is more suitable than a conventional GAA MOSFET for its more I
on/I
off, less Drain-Induced-Barrier-Lowering (DIBL) and less subthreshold slope.

Keywords

EN

NEGF; silicon nanowire; DG-MOSFET; GAA MOSFET; quantum transport

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2011
• Volume: 9
• Issue: 2
• Pages: 472-481

Dates

published

1 - 4 - 2011

online

20 - 2 - 2011

Contributors

author

Esmaeil Dastjerdy

• School of Electrical and Computer Engineering, Shiraz University, Shiraz, Iran

author

Rahim Ghayour

• School of Electrical and Computer Engineering, Shiraz University, Shiraz, Iran

author

Hojjat Sarvari

• School of Electrical and Computer Engineering, Shiraz University, Shiraz, Iran

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Identifiers

DOI

10.2478/s11534-010-0097-6