Nagai Takayuki 永井隆之

Researcher Number	30851018
Affiliation (Current)	2025: 東京大学, 大学院工学系研究科(工学部), 特任助教
Affiliation (based on the past Project Information) *help	2023 – 2024: 東京大学, 大学院工学系研究科(工学部), 特任助教 2022: 東京大学, 大学院新領域創成科学研究科, 特任研究員 2019 – 2021: 東京工業大学, 元素戦略研究センター, 研究員
Review Section/Research Field	Principal Investigator Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related / 0302:Electrical and electronic engineering and related fields
Keywords	Principal Investigator 半導体 / カルコゲナイド / 第一原理計算 / ペロブスカイト / グリーンギャップ / 硫化物 / 相転移 / 極性構造 / アキシャルベクトル / 強誘電体 … More / キラリティ / キャリア制御 / 化学ドーピング / 太陽電池 / ペロブスカイト型構造 / 無極性構造 / カルコゲン化物 / スピネル化合物 / スピネル型構造 / 発光半導体 / エピタキシャル成長 / 緑色発光 / エピタキシャル薄膜 Less

キラリティとアキシャルベクトルの結合に基づく極性物質の探索Principal Investigator
- Principal Investigator
  
  永井隆之
- Project Period (FY)
  2024 – 2026
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
- Research Institution
  The University of Tokyo
Development of novel solar-cell materials based on perovskite-type sulfidesPrincipal Investigator
- Principal Investigator
  
  Nagai Takayuki
- Project Period (FY)
  2022 – 2023
- Research Category
  
  Grant-in-Aid for Early-Career Scientists
- Review Section
  
  Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
- Research Institution
  The University of Tokyo
Search for "green gap free" semiconductor based on spinel-type chalcogenidesPrincipal Investigator
- Principal Investigator
  
  Nagai Takayuki
- Project Period (FY)
  2020 – 2022
- Research Category
  
  Grant-in-Aid for Early-Career Scientists
- Review Section
  
  Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
- Research Institution
  The University of Tokyo
  Tokyo Institute of Technology
Fabrication of epitaxial thin films of perovskite sulfides for green-light-emitting semiconductorsPrincipal Investigator
- Principal Investigator
  
  Nagai Takayuki
- Project Period (FY)
  2019 – 2020
- Research Category
  
  Grant-in-Aid for Research Activity Start-up
- Review Section
  
  0302:Electrical and electronic engineering and related fields
- Research Institution
  Tokyo Institute of Technology

All 2023 2022 2021 2020

All Journal Article Presentation

[Journal Article] Chemical Switching of Ferroaxial and Nonferroaxial Structures Based on Second-Order Jahn?Teller Activity in (Na,K)2Hf(BO3)22023
- Author(s)
 Nagai Takayuki、Kimura Tsuyoshi
- Journal Title
 
 Chemistry of Materials
 
 Volume: 35 Issue: 10 Pages: 4109-4115
- DOI
 10.1021/acs.chemmater.3c00624
- Peer Reviewed / Open Access
- Data Source
 KAKENHI-PROJECT-22K14752, KAKENHI-PLANNED-19H05823, KAKENHI-PROJECT-21H04988, KAKENHI-PROJECT-21H04436
[Journal Article] Detecting Magnetoelectric Effect in a Metallic Antiferromagnet via Nonreciprocal Rotation of Reflected Light2023
- Author(s)
  Arakawa Keito、Hayashida Takeshi、Kimura Kenta、Misawa Ryusuke、Nagai Takayuki、Miyamoto Tatsuya、Okamoto Hiroshi、Iga Fumitoshi、Kimura Tsuyoshi
- Journal Title
  
  Physical Review Letters
  
  Volume: 131 Issue: 23 Pages: 236702-236702
- DOI
  10.1103/physrevlett.131.236702
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-22K14752, KAKENHI-PROJECT-22KJ0797, KAKENHI-PLANNED-19H05823, KAKENHI-PROJECT-21H04988, KAKENHI-PROJECT-21H04436
[Journal Article] Chemical Aspect of Displacive-Type Ferroaxial Phase Transition from Perspective of Second-Order Jahn-Teller Effect: NASICON Systems as an Example2023
- Author(s)
  Takayuki Nagai, Yasuhide Mochizuki, Suguru Yoshida, and Tsuyoshi Kimura
- Journal Title
  
  Journal of the American Chemical Society
  
  Volume: 145 Issue: 14 Pages: 8090-8098
- DOI
  10.1021/jacs.3c00797
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K14471, KAKENHI-PROJECT-22K14752, KAKENHI-PLANNED-19H05823
[Journal Article] Enhancing analysis efficiency: Automation of spectroscopic ellipsometry for crystalline semiconductors and transparent conductive oxides2023
- Author(s)
  Maeda Sara、Tani Yusuke、Katayama Hirotaka、Kanematsu Daiji、Oiwake Kohei、Nishigaki Yukinori、Miyadera Tetsuhiko、Chikamatsu Masayuki、Nagai Takayuki、Aizawa Takuma、Hanzawa Kota、Hiramatsu Hidenori、Terakawa Akira、Hosono Hideo、Fujiwara Hiroyuki
- Journal Title
  
  Thin Solid Films
  
  Volume: 787 Pages: 140099-140099
- DOI
  10.1016/j.tsf.2023.140099
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22K14752
[Journal Article] Phase variation of ferroelectric Li2Sr1-xCax(Nb1-xTax)2O7 by selective reinforcement in the (Nb,Ta)-O covalent bonds2022
- Author(s)
  Nakano Akitoshi、Shirakuni Hirokazu、Nagai Takayuki、Mochizuki Yasuhide、Oba Fumiyasu、Yokota Hiroko、Kawaguchi Shogo、Terasaki Ichiro、Taniguchi Hiroki
- Journal Title
  
  Physical Review Materials
  
  Volume: 6 Issue: 4 Pages: 044412-044412
- DOI
  10.1103/physrevmaterials.6.044412
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20K15363, KAKENHI-PROJECT-22K14752, KAKENHI-PROJECT-21K13878, KAKENHI-PROJECT-23K20818
[Journal Article] Coexisting Mechanisms for the Ferroelectric Phase Transition in Li2SrNb2O72021
- Author(s)
  Mochizuki Yasuhide、Nagai Takayuki、Shirakuni Hirokazu、Nakano Akitoshi、Oba Fumiyasu、Terasaki Ichiro、Taniguchi Hiroki
- Journal Title
  
  Chemistry of Materials
  
  Volume: 33 Issue: 4 Pages: 1257-1264
- DOI
  10.1021/acs.chemmater.0c04032
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K15363, KAKENHI-PROJECT-18J21747, KAKENHI-PROJECT-19K23507
[Journal Article] Phase Transition from Weak Ferroelectricity to Incipient Ferroelectricity in Li2Sr(Nb1-xTax)2O72020
- Author(s)
  Nagai Takayuki、Mochizuki Yasuhide、Shirakuni Hirokazu、Nakano Akitoshi、Oba Fumiyasu、Terasaki Ichiro、Taniguchi Hiroki
- Journal Title
  
  Chemistry of Materials
  
  Volume: 32 Issue: 2 Pages: 744-750
- DOI
  10.1021/acs.chemmater.9b04022
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18J21747, KAKENHI-PROJECT-19K23507
[Journal Article] Optical enhancement of dielectric permittivity in reduced lanthanum aluminate2020
- Author(s)
  Nagai Takayuki、Kuwabara Akihide、Kumagai Yu、Terasaki Ichiro、Taniguchi Hiroki
- Journal Title
  
  Physical Review B
  
  Volume: 101 Issue: 18 Pages: 184114-184114
- DOI
  10.1103/physrevb.101.184114
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20K21076, KAKENHI-PROJECT-20K15363, KAKENHI-PROJECT-19H02416, KAKENHI-PROJECT-18K18855, KAKENHI-PROJECT-19K23507
[Journal Article] Extraordinary Strong Band‐Edge Absorption in Distorted Chalcogenide Perovskites2020
- Author(s)
  Nishigaki Yukinori、Nagai Takayuki、Nishiwaki Mitsutoshi、Aizawa Takuma、Kozawa Masayuki、Hanzawa Kota、Kato Yoshitsune、Sai Hitoshi、Hiramatsu Hidenori、Hosono Hideo、Fujiwara Hiroyuki
- Journal Title
  
  Solar RRL
  
  Volume: 4 Issue: 5 Pages: 1900555-1900555
- DOI
  10.1002/solr.201900555
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19K23507, KAKENHI-PROJECT-20K15170, KAKENHI-PROJECT-19H02167
[Presentation] NASICON物質群を舞台としたフェロアキシャル物質の設計指針の提案2023
- Author(s)
  永井隆之、望月泰英、吉田傑、木村剛
- Organizer
  日本物理学会 2023年春季大会
- Data Source
  KAKENHI-PROJECT-22K14752
[Presentation] 化学結合に着目した(Na,K)Hf2(BO3)2におけるフェロアキシャル構造の制御2023
- Author(s)
  永井隆之、木村剛
- Organizer
  日本物理学会第78回年次大会
- Data Source
  KAKENHI-PROJECT-22K14752
[Presentation] Chemical aspect of ferroaxial order: NASICON systems as a case study2023
- Author(s)
  Takayuki Nagai, Yasuhide Mochizuki, Suguru Yoshida, Tsuyoshi Kimura
- Organizer
  The 21st TAIWAN-JAPAN-KOREA SYMPOSIUM ON STRONGLY CORRELATED ELECTRON SYSTEMS
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K14752
[Presentation] 化学結合に基づくフェロアキシャル物質の探索と構造制御2023
- Author(s)
  永井隆之、木村剛、望月泰英、吉田傑
- Organizer
  第6回固体化学フォーラム
- Data Source
  KAKENHI-PROJECT-22K14752

1. 熊谷悠

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
2. 望月泰英

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results

Nagai Takayuki 永井 隆之

Research Projects

Research Products

Co-Researchers

キラリティとアキシャルベクトルの結合に基づく極性物質の探索Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Development of novel solar-cell materials based on perovskite-type sulfidesPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Search for "green gap free" semiconductor based on spinel-type chalcogenidesPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Fabrication of epitaxial thin films of perovskite sulfides for green-light-emitting semiconductorsPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

[Journal Article] Chemical Switching of Ferroaxial and Nonferroaxial Structures Based on Second-Order Jahn?Teller Activity in (Na,K)<sub>2</sub>Hf(BO<sub>3</sub>)<sub>2</sub>2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Detecting Magnetoelectric Effect in a Metallic Antiferromagnet via Nonreciprocal Rotation of Reflected Light2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Chemical Aspect of Displacive-Type Ferroaxial Phase Transition from Perspective of Second-Order Jahn-Teller Effect: NASICON Systems as an Example2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Enhancing analysis efficiency: Automation of spectroscopic ellipsometry for crystalline semiconductors and transparent conductive oxides2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Phase variation of ferroelectric Li2Sr1-xCax(Nb1-xTax)2O7 by selective reinforcement in the (Nb,Ta)-O covalent bonds2022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Coexisting Mechanisms for the Ferroelectric Phase Transition in Li2SrNb2O72021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Phase Transition from Weak Ferroelectricity to Incipient Ferroelectricity in Li2Sr(Nb1-xTax)2O72020

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Optical enhancement of dielectric permittivity in reduced lanthanum aluminate2020

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Extraordinary Strong Band‐Edge Absorption in Distorted Chalcogenide Perovskites2020

Author(s)

Journal Title

DOI

Data Source

[Presentation] NASICON物質群を舞台とした フェロアキシャル物質の設計指針の提案2023

Author(s)

Organizer

Data Source

[Presentation] 化学結合に着目した(Na,K)Hf2(BO3)2におけるフェロアキシャル構造の制御2023

Author(s)

Organizer

Nagai Takayuki 永井隆之

[Presentation] NASICON物質群を舞台としたフェロアキシャル物質の設計指針の提案2023