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速水 渉 (HAYAMI, Wataru) 0000-0003-0497-8690

Address
305-0044 茨城県つくば市並木1-1 [アクセス]

[論文] | [書籍] | [会議録] | [口頭発表] | [その他の文献] | [公開特許出願]

論文 TSV

2024
  1. Wataru Hayami, Takanobu Hiroto, Kohei Soga, Tadashi Ogitsu, Kaoru Kimura. Thermodynamic stability of elemental boron allotropes with varying numbers of interstitial atoms. Journal of Solid State Chemistry. 329 (2024) 124407 10.1016/j.jssc.2023.124407
2023
  1. Takanobu Hiroto, Yurika Morino, Masaki Yoshikawa, Kohei Soga, Wataru Hayami, Tadashi Ogitsu, Kaoru Kimura. Does photoinduced structural change by β-rhombohedral boron occur at room temperature?. Solid State Sciences. 142 (2023) 107246 10.1016/j.solidstatesciences.2023.107246
2022
  1. Wataru Hayami, Shuai Tang, Jie Tang, Lu-Chang Qin. Effects of low work-function lanthanum oxides on stable electron field emissions from nanoscale emitters. Nanoscale Advances. 4 [21] (2022) 4669-4676 10.1039/d2na00536k Open Access
  2. Takuro Tokunaga, Masao Arai, Kazuaki Kobayashi, Wataru Hayami, Shigeru Suehara, Takuma Shiga, Keunhan Park, Mathieu Francoeur. First-principles calculations of phonon transport across a vacuum gap. Physical Review B. 105 [4] (2022) 045410 10.1103/physrevb.105.045410
2021
  1. Wataru Hayami, Shuai Tang, Ta-Wei Chiu, Jie Tang. Reduction in Work Functions of Transition-Metal Carbides and Oxycarbides upon Oxidation. ACS Omega. 6 [22] (2021) 14559-14565 10.1021/acsomega.1c01671
  2. Shuai Tang, Jie Tang, Jun Uzuhashi, Tadakatsu Ohkubo, Wataru Hayami, Jinshi Yuan, Masaki Takeguchi, Masanori Mitome, Lu-Chang Qin. A stable LaB6 nanoneedle field-emission point electron source. Nanoscale Advances. 3 [10] (2021) 2787-2792 10.1039/d1na00167a Open Access
2020
  1. Ta-Wei Chiu, Jie Tang, Shuai Tang, Wataru Hayami, Jinshi Yuan, Lu-Chang Qin. Reduced work function and improved field emission stability of ZrC nanowires upon surface oxidation. Applied Physics Letters. 117 [5] (2020) 053101 10.1063/5.0016436
  2. Shuai Tang, Jie Tang, Ta-wei Chiu, Wataru Hayami, Jun Uzuhashi, Tadakatsu Ohkubo, Fumihiko Uesugi, Masaki Takeguchi, Masanori Mitome, Lu-Chang Qin. A HfC nanowire point electron source with oxycarbide surface of lower work function for high-brightness and stable field-emission. Nano Research. 13 [6] (2020) 1620-1626 10.1007/s12274-020-2782-0
  3. Wataru Hayami, Takaho Tanaka. Superconductivity of alkali-metal intercalated BC2. AIP Advances. 10 [6] (2020) 065213 10.1063/5.0008280 Open Access
  4. Wataru Hayami, Takaho Tanaka. A graphene-MXene complex compound and graphite-like BC2. Solid State Sciences. 102 (2020) 106170 10.1016/j.solidstatesciences.2020.106170
2019
  1. Katsumi Nagaoka, Wataru Hayami, Shun-ichiro Ohmi. Scanning tunneling spectroscopy study of 20 nm-thick nitrogen-doped lanthanum hexaboride thin film. Vacuum. 170 (2019) 108973 10.1016/j.vacuum.2019.108973
  2. Wataru Hayami, Takaho Tanaka. Influence of electric charge on the stability of graphite-like BC2. Journal of Solid State Chemistry. 269 (2019) 113-117 10.1016/j.jssc.2018.09.006
2017
  1. Wataru Hayami. Structure of graphite-like BC 2 layer in Sc 2 B 1.1 C 3.2 : An intermediate between BC and BC 3. Journal of Solid State Chemistry. 254 (2017) 144-149 10.1016/j.jssc.2017.07.021
  2. Wataru Hayami. First-order polyamorphic phase transition in boron nitride. Journal of Non-Crystalline Solids. 456 (2017) 132-137 10.1016/j.jnoncrysol.2016.11.008
2015
  1. Wataru Hayami. Structural stability and electronic properties of β-tetragonal boron: A first-principles study. Journal of Solid State Chemistry. 221 (2015) 378-383 10.1016/j.jssc.2014.10.012
2013
  1. Wataru Hayami, Ai Momozawa, Shigeki Otani. Effect of Defects in the Formation of AlB2-Type WB2 and MoB2. Inorganic Chemistry. 52 [13] (2013) 7573-7577 10.1021/ic400587j
2011
  1. Wataru Hayami, Shigeki Otani. Structural Stability of Boron Clusters with Octahedral and Tetrahedral Symmetries. The Journal of Physical Chemistry A. 115 [29] (2011) 8204-8207 10.1021/jp204115x
2010
  1. Wataru Hayami, Shigeki Otani. First-principles study of the crystal and electronic structures of α-tetragonal boron. Journal of Solid State Chemistry. 183 [7] (2010) 1521-1528 10.1016/j.jssc.2010.04.036
  2. C. Özdoğan, S. Mukhopadhyay, W. Hayami, Z. B. Güvenç, R. Pandey, I. Boustani. The Unusually Stable B100Fullerene, Structural Transitions in Boron Nanostructures, and a Comparative Study of α- and γ-Boron and Sheets. The Journal of Physical Chemistry C. 114 [10] (2010) 4362-4375 10.1021/jp911641u
2009
  1. Wataru Hayami, Shigeki Otani. First-principles study of the electronic structures of α-rhombohedral boron codoped with lithium and oxygen. Journal of Solid State Chemistry. 182 [7] (2009) 1856-1860 10.1016/j.jssc.2009.04.027
  2. Wataru Hayami. First-Principles Study of the Electronic Structure and Cluster Formation in Expanded Liquid Boron. The Journal of Physical Chemistry A. 113 [19] (2009) 5506-5511 10.1021/jp9006922
2008
  1. Wataru Hayami, Shigeki Otani. Effect of codoping in alpha-rhombohedral boron. The Journal of Physical Chemistry C. 112 [7] (2008) 2711-2715 10.1021/jp710239f
2007
  1. Wataru Hayami, Shigeki Otani. Surface Energy and Growth Mechanism of b-tetragonal Boron Crystal . The Journal of Physical Chemistry C. 111 [28] (2007) 10394-10397 10.1021/jp072594z
  2. Wataru Hayami, Shigeki Otani. The Role of Surface Energy in the Growth of Boron Crystals. The Journal of Physical Chemistry C. 111 [2] (2007) 688-692 10.1021/jp065680s
2006
  1. HAYAMI, Wataru, TANAKA, Takaho, OTANI, Shigeki. Stability of lithium in alpha-rhombohedral boron. JOURNAL OF SOLID STATE CHEMISTRY. (2006) 2827-2833
2005
  1. Wataru Hayami, Takaho Tanaka, Shigeki Otani. Theoretical Study of the Stability of Lithium Atoms in Alpha-Rhombohedral Boron. The Journal of Physical Chemistry A. 109 [51] (2005) 11975-11979 10.1021/jp053031v
2004
  1. Wataru Hayami. Computational method for the intrasite matrix elements of the Hamiltonian for tight-binding molecular dynamics calculations. Physical Review B. 70 [23] (2004) 233102 10.1103/physrevb.70.233102
  2. Wataru Hayami, Takashi Aizawa, Takaho Tanaka, Shigeki Otani. Theoretical study of the electronic structures of HfB2(0001)-X (X=Li-Ne) surfaces. The Journal of Physical Chemistry B. 108 [39] (2004) 15233-15237 10.1021/jp0489727

書籍 TSV

会議録 TSV

2009
  1. HAYAMI, Wataru, OTANI, Shigeki. Effect of the Surface Energy on the Growth of Boron Nanocrystals. Journal of Physics: Conference Series. (2009) 012017-1-012017-7

口頭発表 TSV

2024
  1. 廣戸 孝信, 速水 渉, 上村直樹, 曽我公平, 荻津格, 木村 薫. β菱面体晶ホウ素における格子膨張と亜水素化ホウ素作製の試み. 第16回日本ホウ素・ホウ化物研究会. 2024
  2. 速水 渉, 廣戸 孝信, 曽我 公平, 荻津 格, 木村 薫. ホウ素の格子間原子を考慮した熱力学的安定性. 第16回日本ホウ素・ホウ化物研究会. 2024
2023
  1. 廣戸 孝信, 速水 渉, 曽我 公平, 荻津 格, 木村 薫. β菱面体晶ホウ素の異常な格子膨張. 第28回準結晶研究会. 2023
  2. HIROTO, Takanobu, Yurika Morino, Masaki Yoshikawa, Kohei Soga, HAYAMI, Wataru, Tadashi Ogitsu, KIMURA, Kaoru. Structural change of β-rhombohedral boron by temperature and light irradiation. 5th Hypermaterials Young Research Seminar. 2023
  3. 廣戸 孝信, 速水 渉, 木村 薫, 森野友里香, 吉川政希, 曽我公平, 荻津格. β菱面体晶ホウ素における光誘起構造変化の観測. 第15回 日本ホウ素・ホウ化物研究会. 2023
  4. 速水 渉, タン シュアイ, 唐 捷, 秦禄昌. ナノサイズLaB6電子エミッターの安定性に対する酸化ランタンの役割. 第15回　日本ホウ素・ホウ化物研究会. 2023
  5. 荻津 格, 速水 渉, 廣戸 孝信, 曽我 公平, 木村 薫. ホウ素の奇妙な物性. 第15回 日本ホウ素・ホウ化物研究会. 2023
2022
  1. HIROTO, Takanobu, Yurika Morino, Masaki Yoshikawa, Kohei Soga, HAYAMI, Wataru, Tadashi Ogitsu, KIMURA, Kaoru. Temperature and photoinduced structural change of β-rhombohedral boron. The 4th Hypermaterials Young Research Seminar. 2022
  2. HIROTO, Takanobu, Yurika Morino, Masaki Yoshikawa, Kohei Soga, HAYAMI, Wataru, Tadashi Ogitsu, KIMURA, Kaoru. Does photo-induced structural change of β-rhombohedral boron occur at room temperature?. 21st International Symposium on Boron, Borides and related materials (ISBB2022). 2022
2021
  1. タン シュアイ, 唐 捷, チュー ターウェイ, 速水 渉, Luchang Qin. A HfC nanowire field emission point electron source . 34th International Vacuum Nanoelectronics Conferences (VNC 2021). 2021
  2. 速水 渉, 田中高穂. A graphene-MXene complex compound and graphite-like BC2. MANA International symposium 2021. 2021
2019
  1. HAYAMI, Wataru, TANAKA, Takaho. A graphene-MXene complex compound and graphite-like BC2. 20th International Symposium on Boron, Borides and Related Materials. 2019
  2. 速水 渉, 田中 高穗. グラファイト状BC2 の構造安定性とLiインターカレーション. 第13回日本ホウ素・ホウ化物研究会. 2019
2018
  1. 速水 渉, 田中 高穗. グラファイト状BC_2_の安定構造の電荷依存性. 日本物理学会　2018年秋季大会. 2018
2017
  1. 速水 渉, 田中 高穗. Sc2B1.1C3.2におけるグラファイト状BC2層の構造と電子状態. 日本物理学会2017年秋季大会. 2017
  2. 速水 渉, 田中 高穗. Sc2B1.1C3.2の構造と電子状態. 第11回日本ホウ素・ホウ化物研究会. 2017
2016
  1. 速水 渉. アモルファス窒化ホウ素の構造とポリアモルフィズムの可能性. 日本物理学会第71回年次大会. 2016
  2. 速水 渉. アモルファス窒化ホウ素の構造相転移. 第10回日本ホウ素・ホウ化物研究会. 2016
2015
  1. 速水 渉. β 正方晶ホウ素の構造安定性と電子特性：第一原理計算による研究. 日本物理学会第70回年次大会. 2015
2014
  1. 速水 渉, 桃沢愛, 大谷 茂樹. WB2とMoB2の生成におけるホウ素欠陥の影響. 日本物理学会第69回年次大会. 2014
2013
  1. 速水 渉, 桃沢愛, 大谷 茂樹. WB2及びMoB2の生成におけるホウ素欠陥の影響：AlB2型のWB2の存在可能性について. 第九回 日本ホウ素・ホウ化物研究会. 2013
2011
  1. 速水 渉, 大谷 茂樹. 正八面体対称ホウ素クラスターの構造安定性. 日本物理学会第66回年次大会. 2011
2010
  1. 速水 渉, 大谷 茂樹. α正方晶型ホウ素の構造と電子状態の第一原理計算による研究. 日本物理学会第65回年次大会. 2010
2009
  1. 速水 渉, 大谷 茂樹. コドープされたα菱面体晶ホウ素の第一原理計算による研究. 日本物理学会2009年秋季大会. 2009
2008
  1. HAYAMI, Wataru. Effect of the Surface Energy on the Growth of Boron Nanocrystals. 16th Internationla Symposium on Boron, Borides and Related Mater. 2008
2007
  1. 速水 渉, 大谷 茂樹. ホウ素微結晶成長における表面エネルギーの役割II. 日本物理学会　第62回年次大会. 2007
2006
  1. 速水 渉, 大谷 茂樹. ホウ素微結晶成長における表面エネルギーの役割. 日本物理学会　２００６年秋期大会. 2006
2005
  1. 速水 渉, 田中 高穗, 大谷 茂樹. 分子動力学法によるα菱面体晶ボロン内のLi原子の安定性の研究　. 日本物理学会2005年秋期大会. 2005
  2. HAYAMI, Wataru. Stability of lithium in alpha-rhombohedral boron. 15th International Symposium on Boron, Borides and Related Compo. 2005
2004
  1. 速水 渉. Tight-Binding Molecular Dynamicsにおけるハミルトニアンのサイト内行列要素の計算法. 日本物理学会2004年秋期大会. 2004

その他の文献 TSV

公開特許出願 TSV

  1. エミッタ、それを用いた電子銃、それを用いた電子機器、および、その製造方法 (2022)

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