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Paper Abstract and Keywords
Presentation 2019-01-29 09:30
[Invited Talk] Multidomain Dynamics of Ferroelectric Polarization in Negative Capacitance State and its Impacts on Performances of Field-Effect Transistors
Hiroyuki Ota, Tsutomu Ikegami, Koichi Fukuda, Junichi HattoriI, Hidehiro Asai, Kazuhiko Endo, Shinji Migita (AIST), Akira Toriumi (The Univ. of Tokyo) SDM2018-81 Link to ES Tech. Rep. Archives: SDM2018-81
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we clarified the multidomain dynamics of ferroelectric polarization in the Negative Capacitance Field-Effect Transistors (NCFETs) by an in-house Technology Computer-Aided Design (TCAD) module for the first time. It enables self-consistent simulations among the time-dependent Landau-Khalatnikov equation and the other equations that govern operation of FETs. Our simulation reveals that domain-wall thickness Tdw, which reflects a correlation strength between domains predominates coherency of the NC polarization. In a strong correlation (large Tdw) case, where Tdw is larger than the gate length, a coherent NC polarization is realized. On the other hand, in a weak correlation (small Tdw) case, where Tdw is smaller than the gate length, the ferroelectric polarization is split into multiple spontaneous polarization domains. This coherency breaking found to give rise to deterioration of improving the subthreshold in the negative capacitance transistor. Design methodology to maintain single domain polarization in negative capacitances is also proposed.
Keyword (in Japanese) (See Japanese page) 
(in English) ferroelectricity / negative capacitance / TCAD / self-consistent / multidomain / steep subthreshold swing / transient analysis / domain wall thickness  
Reference Info. IEICE Tech. Rep., vol. 118, no. 429, SDM2018-81, pp. 1-4, Jan. 2019.
Paper # SDM2018-81 
Date of Issue 2019-01-22 (SDM) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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Download PDF SDM2018-81 Link to ES Tech. Rep. Archives: SDM2018-81

Conference Information
Committee SDM  
Conference Date 2019-01-29 - 2019-01-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SDM 
Conference Code 2019-01-SDM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Multidomain Dynamics of Ferroelectric Polarization in Negative Capacitance State and its Impacts on Performances of Field-Effect Transistors 
Sub Title (in English)  
Keyword(1) ferroelectricity  
Keyword(2) negative capacitance  
Keyword(3) TCAD  
Keyword(4) self-consistent  
Keyword(5) multidomain  
Keyword(6) steep subthreshold swing  
Keyword(7) transient analysis  
Keyword(8) domain wall thickness  
1st Author's Name Hiroyuki Ota  
1st Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
2nd Author's Name Tsutomu Ikegami  
2nd Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
3rd Author's Name Koichi Fukuda  
3rd Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
4th Author's Name Junichi HattoriI  
4th Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
5th Author's Name Hidehiro Asai  
5th Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
6th Author's Name Kazuhiko Endo  
6th Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
7th Author's Name Shinji Migita  
7th Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
8th Author's Name Akira Toriumi  
8th Author's Affiliation The University of Tokyo (The Univ. of Tokyo)
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Speaker
Date Time 2019-01-29 09:30:00 
Presentation Time 25 
Registration for SDM 
Paper # IEICE-SDM2018-81 
Volume (vol) IEICE-118 
Number (no) no.429 
Page pp.1-4 
#Pages IEICE-4 
Date of Issue IEICE-SDM-2019-01-22 


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