Evidence for a Field-Independent Enhancement Factor in the Real Tunneling Potential Barrier of Nanotube Emitters

Caio P. de Castro; Thiago A. de Assis; Roberto Rivelino; Fernando B. Mota; Caio M. C. de Castilho; Richard G. Forbes

doi:10.1109/IVNC57695.2023.10188979

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Evidence for a Field-Independent Enhancement Factor in the Real Tunneling Potential Barrier of Nanotube Emitters

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Evidence for a Field-Independent Enhancement Factor in the Real Tunneling Potential Barrier of Nanotube Emitters

Caio P. de Castro, Thiago A. de Assis, Roberto Rivelino, Fernando B. Mota, Caio M. C. de Castilho and Richard G. Forbes

Proceedings of the 2023 IEEE 36th International Vacuum Nanoelectronics Conference (IVNC), pp.25-27

2023 IEEE 36th International Vacuum Nanoelectronics Conference (IVNC 2023) (Massachusetts Institute of Technology Campus, Cambridge, MA, USA, 10/07/2023 - 13/07/2023)

27/07/2023

DOI: https://doi.org/10.1109/IVNC57695.2023.10188979

Abstract

Carbon nanotubes

Density functional theory

Discrete Fourier transforms

Electric potential

Electron emission

Induced Field Enhancement Factor

Tunneling

Tunneling Barrier

Nanoelectronics

We have demonstrated evidence that: (a) a constant characteristic induced field enhancement factor (FEF) can be determined from ab initio density functional theory (DFT) calculations on carbon nanotubes; and (b) this FEF adequately describes the real tunneling barrier. We have confirmed this finding in capped (6,6) armchair, (10,0) zigzag and (10,5) single walled carbon nanotubes (SWCNTs). In all these cases, we have verified that the characteristic local induced field enhancement factor (LIFEF) does not significantly depend on the macroscopic applied field. This establishes the LIFEF as a field-independent characterization parameter for nano-emitters.

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Title: Evidence for a Field-Independent Enhancement Factor in the Real Tunneling Potential Barrier of Nanotube Emitters
Creators: Caio P. de Castro (Author) - Institute of Physics, Federal University of Bahia,Salvador,BA,Brazil
Thiago A. de Assis (Corresponding Author) - Universidade Federal da Bahia
Roberto Rivelino (Author) - Institute of Physics, Federal University of Bahia,Salvador,BA,Brazil
Fernando B. Mota (Author) - Universidade Federal da Bahia
Caio M. C. de Castilho (Author) - Universidade Federal da Bahia
Richard G. Forbes (Author) - University of Surrey, School of Computer Science and Electronic Engineering
Publication Details: Proceedings of the 2023 IEEE 36th International Vacuum Nanoelectronics Conference (IVNC), pp.25-27
Conference: 2023 IEEE 36th International Vacuum Nanoelectronics Conference (IVNC 2023) (Massachusetts Institute of Technology Campus, Cambridge, MA, USA, 10/07/2023 - 13/07/2023)
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Grant note: This work was partially supported by the Brazilian agencies: Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior (CAPES), Finance Code 001, Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), and Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB). R.R. also thanks INCT-FCx. TAdA also thanks Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), under Grant No. E-26/203.860/2022.
Identifiers: 9798350301441; 99821857702346
Academic Unit: School of Computer Science and Electronic Engineering
Language: English
Resource Type: Conference proceeding

Evidence for a Field-Independent Enhancement Factor in the Real Tunneling Potential Barrier of Nanotube Emitters

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