This work discusses the compact model and the physics of nanoscale field-effect transistors (FETs), specifically the Virtual Source (VS) model. It points out how conventional compact models, originally formulated for microscale devices, can be extended to characterize nanoscale FETs by redefining fundamental parameters such as mobility and saturation velocity. The authors employ the Landauer method to give physical meaning to these parameters and demonstrate that transport in nanoscale FETs is diffusion-limited close to the virtual source, both below and above threshold. The work also addresses how current saturation is controlled by velocity saturation near the source instead of the maximum channel velocity and why conventional models are still valid even though the nanoscale has different transport mechanisms. The findings seek to close the gap between compact modeling and device physics, providing a better understanding of nanoscale FET behavior for both circuit design and research purposes.
Virtual Source (VS) model, Landauer method, diffusion-limited transport, current saturation, velocity saturation
International Journal of Trend in Scientific Research and Development - IJTSRD having
online ISSN 2456-6470. IJTSRD is a leading Open Access, Peer-Reviewed International
Journal which provides rapid publication of your research articles and aims to promote
the theory and practice along with knowledge sharing between researchers, developers,
engineers, students, and practitioners working in and around the world in many areas
like Sciences, Technology, Innovation, Engineering, Agriculture, Management and
many more and it is recommended by all Universities, review articles and short communications
in all subjects. IJTSRD running an International Journal who are proving quality
publication of peer reviewed and refereed international journals from diverse fields
that emphasizes new research, development and their applications. IJTSRD provides
an online access to exchange your research work, technical notes & surveying results
among professionals throughout the world in e-journals. IJTSRD is a fastest growing
and dynamic professional organization. The aim of this organization is to provide
access not only to world class research resources, but through its professionals
aim to bring in a significant transformation in the real of open access journals
and online publishing.