Scalability assessment of Group-IV mono-chalcogenide based tunnel FET
10.1038/s41598-018-24209-1
Crossref journal-article
Springer Science and Business Media LLC
Scientific Reports (297)
Abstract

AbstractSelection of appropriate channel material is the key to design high performance tunnel field effect transistor (TFET), which promises to outperform the conventional metal oxide semiconductor field effect transistor (MOSFET) in ultra-low energy switching applications. Recently discovered atomically thin GeSe, a group IV mono-chalcogenide, can be a potential candidate owing to its direct electronic band gap and low carrier effective mass. In this work we employ ballistic quantum transport model to assess the intrinsic performance limit of monolayer GeSe-TFET. We first study the electronic band structure by regular and hybrid density functional theory and develop two bandk · phamiltonian for the material. We find that the complex band wraps itself within the conduction band and valence band edges and thus signifies efficient band to band tunneling mechanism. We then use thek · phamiltonian to calculate self-consistent solution of the transport equations within the non-equilibrium Green’s function formalism and the Poisson’s equation based electrostatic potential. Keeping the OFF-current fixed at 10 pA/μm we investigate different static and dynamic performance metrics (ON current, energy and delay) under three different constant-field scaling rules: 40, 30 and 20 nm/V. Our study shows that monolayer GeSe-TFET is scalable till 8 nm while preserving ON/OFF current ratio higher than 104.

Bibliography

Brahma, M., Kabiraj, A., Saha, D., & Mahapatra, S. (2018). Scalability assessment of Group-IV mono-chalcogenide based tunnel FET. Scientific Reports, 8(1).

Authors 4
  1. Madhuchhanda Brahma (first)
  2. Arnab Kabiraj (additional)
  3. Dipankar Saha (additional)
  4. Santanu Mahapatra (additional)
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Dates
Type When
Created 7 years, 4 months ago (April 11, 2018, 11:03 a.m.)
Deposited 1 month, 2 weeks ago (July 3, 2025, 11:53 a.m.)
Indexed 1 month, 2 weeks ago (July 4, 2025, 12:09 a.m.)
Issued 7 years, 4 months ago (April 16, 2018)
Published 7 years, 4 months ago (April 16, 2018)
Published Online 7 years, 4 months ago (April 16, 2018)
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@article{Brahma_2018, title={Scalability assessment of Group-IV mono-chalcogenide based tunnel FET}, volume={8}, ISSN={2045-2322}, url={http://dx.doi.org/10.1038/s41598-018-24209-1}, DOI={10.1038/s41598-018-24209-1}, number={1}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Brahma, Madhuchhanda and Kabiraj, Arnab and Saha, Dipankar and Mahapatra, Santanu}, year={2018}, month=apr }