Nanomechanics on rewritable material strength by anomalous electrons

• Project/Area Number: 20H05653
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Review Section: Broad Section C
• Research Institution: Kyoto University
• Principal Investigator: 平方 寛之 京都大学, 工学研究科, 教授 (40362454)
• Co-Investigator(Kenkyū-buntansha): 嶋田 隆広 京都大学, 工学研究科, 教授 (20534259)
• Project Period (FY): 2020-08-31 – 2025-03-31
• Project Status: Completed (Fiscal Year 2023)
• Budget Amount: ¥201,240,000 (Direct Cost: ¥154,800,000、Indirect Cost: ¥46,440,000); Fiscal Year 2023: ¥25,870,000 (Direct Cost: ¥19,900,000、Indirect Cost: ¥5,970,000); Fiscal Year 2022: ¥32,500,000 (Direct Cost: ¥25,000,000、Indirect Cost: ¥7,500,000); Fiscal Year 2021: ¥33,930,000 (Direct Cost: ¥26,100,000、Indirect Cost: ¥7,830,000); Fiscal Year 2020: ¥93,730,000 (Direct Cost: ¥72,100,000、Indirect Cost: ¥21,630,000)
• Keywords: 材料強度 / 電子

Outline of Research at the Start

本研究では、Anomalous電子（余剰電子/ホール）が原子間結合に干渉することで材料の強度・機械的特性を書き換える根源的なメカニズムを解明して、その学理を構築する。このため、電子を制御した微小体積試験体への強度実験と量子論的（第一原理）解析により、Anomalous電子による強度変化特性を解明する。さらに、その特異な電子状態を評価し、「電子応力」を抽出する独自理論により、電子的強化機構と法則を解明する。

Outline of Annual Research Achievements

本年度は、１．電子/ホール注入材に対する強度実験、２．疲労・クリープ特性への展開、３．電子注入材の強度解析、および、４．強化機構の解明に取り組んだ。研究実績の概要は以下の通りである。
１．前年度に引き続き、電子注入材に対する強度試験を実施してデータの拡充を図った。主要な成果として、アモルファス絶縁体である合成石英に対する電子/ホール注入・除去と破壊じん性試験を行い、余剰電子/ホールを静電気として注入すると、破壊じん性が2倍以上に劇的に向上し長期間維持されること、および、注入した余剰電子/ホールを周囲環境の制御（熱処理等）により除去すると、向上した強度が一部復元することを明らかにした。すなわち、高強度を自在に付与したり取り除いたりすることが可能であり、材料強度のリライタブル性を実証した。
２．前年度までに導入・整備した力学試験装置を用いて、繰返し負荷および長時間の荷重負荷試験を可能とし、電子／ホール制御条件下における疲労およびクリープ特性を評価する方法を確立した。
３．共有結合性、イオン結合性、および金属結合性の典型材料を対象として、電子注入材に対する強度解析を系統的に実施して、結合様式や負荷モードによる強化法則を体系化した。とくに、余剰電子/ホールによる電子的効果は引張強度とせん断強度で異なる傾向を示し、脆性破壊から延性破壊など、変形・破壊形態を大きく変化させることを明らかにした。
４．実験と解析によって得た電子注入材の強度特性とその電子応力状態解析結果を基に、Anomalous電子による強化機構および結合様式・負荷モード依存性を電子論に基づいて解明した。

Research Progress Status

令和5年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和5年度が最終年度であるため、記入しない。

Assessment Rating

Interim Assessment Comments (Rating)

A: In light of the aim of introducing the research area into the research categories, the expected progress has been made in research.

Research Products

• [Journal Article] Mechanical effect on skyrmion-skyrmion interaction (2024)
  • Author(s): Wang Yu、Wang Jie、Kitamura Takayuki、Hirakata Hiroyuki、Shimada Takahiro
  • Journal Title: International Journal of Mechanical Sciences Volume: 261 Pages: 108699-108699
  • DOI: 10.1016/j.ijmecsci.2023.108699
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Mechanical Rippling for Diverse Ferroelectric Topologies in Otherwise Nonferroelectric Nanofilms (2024)
  • Author(s): Xu Tao、Wu Chengsheng、Zheng Sizheng、Wang Yu、Wang Jie、Hirakata Hiroyuki、Kitamura Takayuki、Shimada Takahiro
  • Journal Title: Physical Review Letters Volume: 132 Issue: 8 Pages: 086801-086801
  • DOI: 10.1103/physrevlett.132.086801
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Emergent ultrasmall multiferroics in paraelectric perovskite oxide by hole polarons (2024)
  • Author(s): Xu Tao、Mori Masataka、Hirakata Hiroyuki、Kitamura Takayuki、Shimada Takahiro
  • Journal Title: Physical Chemistry Chemical Physics Volume: 26 Issue: 2 Pages: 842-847
  • DOI: 10.1039/d3cp05364d
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spontaneous Atomic-Scale Polar Skyrmions and Merons on a SrTiO3 (001) Surface: Defect Engineering for Emerging Topological Orders (2024)
  • Author(s): Minami Susumu、Ikeda Yoshitaka、Shimada Takahiro
  • Journal Title: Nano Letters Volume: 24 Issue: 12 Pages: 3686-3693
  • DOI: 10.1021/acs.nanolett.3c05112
  • Peer Reviewed
• [Journal Article] Electronic strengthening mechanism of covalent Si via excess electron/hole doping (2023)
  • Author(s): Noda Hiroki、Sakaguchi Shumpei、Fujita Ryoga、Minami Susumu、Hirakata Hiroyuki、Shimada Takahiro
  • Journal Title: Scientific Reports Volume: 13 Issue: 1 Pages: 16546-16546
  • DOI: 10.1038/s41598-023-42676-z
  • Peer Reviewed
• [Journal Article] Ultrasmall Polar Skyrmions and Merons in SrTiO₃ Heterostructures by Polaron Engineering (2023)
  • Author(s): Xu Tao、Ichiki Yuuki、Masuda Kairi、Wang Yu、Hirakata Hiroyuki、Shimada Takahiro
  • Journal Title: ACS Nano Volume: 17 Issue: 11 Pages: 10836-10843
  • DOI: 10.1021/acsnano.3c02481
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Interfacial thermal damage and fatigue between auxetic honeycomb sandwich and underneath substrate (2023)
  • Author(s): Hu J.S.、Wang B.L.、Hirakata H.、Li Z.
  • Journal Title: International Journal of Solids and Structures Volume: 279 Pages: 112364-112364
  • DOI: 10.1016/j.ijsolstr.2023.112364
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Analyzing the bending deformation of van der Waals-layered materials by a semi-discrete layer model (2023)
  • Author(s): Akiyoshi Masao、Shimada Takahiro、Hirakata Hiroyuki
  • Journal Title: Journal of Applied Physics Volume: 134 Issue: 17 Pages: 175102-175102
  • DOI: 10.1063/5.0170037
  • Peer Reviewed
• [Journal Article] Discovery of Ultrasmall Polar Merons and Rich Topological Phase Transitions: Defects Make 2D Lead Chalcogenides Flexible Topological Materials (2023)
  • Author(s): Xu Tao、Qian Tao、Wang Jie、Hirakata Hiroyuki、Shimada Takahiro、Kitamura Takayuki
  • Journal Title: Advanced Functional Materials Volume: 34 Issue: 10 Pages: 2311141-2311141
  • DOI: 10.1002/adfm.202311141
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Superelastic-like nonlinear deformation hidden in ferroelectric ceramics (2023)
  • Author(s): Minami Susumu、Nakayama Tomohiro、Shimada Takahiro
  • Journal Title: Journal of Applied Physics Volume: 134 Issue: 9 Pages: 094102-094102
  • DOI: 10.1063/5.0164669
  • Peer Reviewed
• [Journal Article] Efficient phase-field simulation for linear superelastic NiTi alloys under temperature gradients (2023)
  • Author(s): Xu Tao、Wang Chunyu、Zhu Yuquan、Wang Yu、Yan Yabin、Wang Jie、Shimada Takahiro、Kitamura Takayuki
  • Journal Title: International Journal of Mechanical Sciences Volume: 259 Pages: 108592-108592
  • DOI: 10.1016/j.ijmecsci.2023.108592
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] First-principles study of strain-induced magnetic phase transition in iron with carrier doping (2023)
  • Author(s): MINAMI Susumu、ABE Yoshimasa、SHIMADA Takahiro
  • Journal Title: Transactions of the JSME (in Japanese) Volume: 89 Issue: 924 Pages: 23-00119-23-00119
  • DOI: 10.1299/transjsme.23-00119
  • ISSN: 2187-9761
  • Peer Reviewed
• [Journal Article] Effects of excess electrons/holes on fracture toughness of single-crystal Si (2023)
  • Author(s): Hirakata Hiroyuki、Homma Shigekazu、Noda Hiroki、Sakaguchi Shumpei、Shimada Takahiro
  • Journal Title: Journal of Applied Physics Volume: 133 Issue: 3 Pages: 035101-035101
  • DOI: 10.1063/5.0123580
  • Peer Reviewed
• [Journal Article] High fracture toughness in van der Waals-layered MoTe2: Disappearance of stress singularity (2023)
  • Author(s): Hirakata Hiroyuki、Akiyoshi Masao、Masuda Ryoichi、Shimada Takahiro
  • Journal Title: Engineering Fracture Mechanics Volume: 277 Pages: 108974-108974
  • DOI: 10.1016/j.engfracmech.2022.108974
  • Peer Reviewed
• [Journal Article] Thermal shock fracture analysis of auxetic honeycomb layer based on non-Fourier heat conduction (2023)
  • Author(s): Hu J.S.、Wang B.L.、Hirakata H.、Wang K.F.
  • Journal Title: Engineering Structures Volume: 279 Pages: 115581-115581
  • DOI: 10.1016/j.engstruct.2022.115581
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Analysis of wave-particle drag effect in flexoelectric semiconductor plates via Mindlin method (2023)
  • Author(s): Qu Yilin、Zhu Feng、Pan Ernian、Jin Feng、Hirakata Hiroyuki
  • Journal Title: Applied Mathematical Modelling Volume: 118 Pages: 541-555
  • DOI: 10.1016/j.apm.2023.01.040
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Dynamic precursor effect: Magnitude-fluctuated coherent spin waves emitted by skyrmions (2023)
  • Author(s): Wang Yu、Wang Jie、Kitamura Takayuki、Hirakata Hiroyuki、Shimada Takahiro
  • Journal Title: Acta Materialia Volume: 250 Pages: 118867-118867
  • DOI: 10.1016/j.actamat.2023.118867
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Lamellar aspect-ratio and thickness-dependent strength-ductility synergy in pure nickel during in-situ micro-tensile loading (2023)
  • Author(s): Wang Zi-Meng、Jia Yun-Fei、Li Kai-Shang、Zhang Yong、Cai Jia-Dong、Zhang Xian-Cheng、Hirakata Hiroyuki、Tu Shan-Tung
  • Journal Title: Journal of Materials Science & Technology Volume: 157 Pages: 89-97
  • DOI: 10.1016/j.jmst.2023.01.037
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Bending deformation and self-restoration of submicron-sized graphite cantilevers (2022)
  • Author(s): Akiyoshi Masao、Koike Shunya、Shimada Takahiro、Hirakata Hiroyuki
  • Journal Title: Acta Materialia Volume: 241 Pages: 118381-118381
  • DOI: 10.1016/j.actamat.2022.118381
  • Peer Reviewed
• [Journal Article] Mechanical Acceleration and Control of the Thermal Motion of a Magnetic Skyrmion (2022)
  • Author(s): Wang Yu、Kitamura Takayuki、Wang Jie、Hirakata Hiroyuki、Shimada Takahiro
  • Journal Title: Physical Review Applied Volume: 18 Issue: 1 Pages: 014049-014049
  • DOI: 10.1103/physrevapplied.18.014049
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effective modeling of magnitude-fluctuated magnetization dynamics: Dynamic precursor effect in magnets (2022)
  • Author(s): Wang Yu、Wang Jie、Kitamura Takayuki、Hirakata Hiroyuki、Shimada Takahiro
  • Journal Title: Physical Review B Volume: 106 Issue: 9 Pages: 094423-094423
  • DOI: 10.1103/physrevb.106.094423
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Exponential Temperature Effects on Skyrmion-Skyrmion Interaction (2022)
  • Author(s): Wang Yu、Wang Jie、Kitamura Takayuki、Hirakata Hiroyuki、Shimada Takahiro
  • Journal Title: Physical Review Applied Volume: 18 Issue: 4 Pages: 044024-044024
  • DOI: 10.1103/physrevapplied.18.044024
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A novel atomic J-integral concept beyond conventional fracture mechanics (2022)
  • Author(s): Jia Pengfei、Huang Kai、Yu Hongjun、Shimada Takahiro、Guo Licheng、Kitamura Takayuki
  • Journal Title: Theoretical and Applied Fracture Mechanics Volume: 121 Pages: 103531-103531
  • DOI: 10.1016/j.tafmec.2022.103531
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ultrasmall-Scale Brittle Fracture Initiated from a Dislocation in SrTiO₃ (2022)
  • Author(s): Sumigawa Takashi、Shimada Takahiro、Huang Kai、Mizuno Yuki、Hagiwara Yohei、Ozaki Naoki、Kitamura Takayuki
  • Journal Title: Nano Letters Volume: 22 Issue: 5 Pages: 2077-2084
  • DOI: 10.1021/acs.nanolett.2c00005
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A unified atomic energy release rate criterion for nonlinear brittle fracture in graphene nanoribbons (2022)
  • Author(s): Jia Pengfei、Huang Kai、Sumigawa Takashi、Shimada Takahiro、Guo Licheng、Kitamura Takayuki
  • Journal Title: International Journal of Solids and Structures Volume: 234-235 Pages: 111260-111260
  • DOI: 10.1016/j.ijsolstr.2021.111260
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Thermomechanical conversion in high-rate plastic deformation of nanotwinned polycrystalline copper (2022)
  • Author(s): Xiong Qi-lin、Li Zhenhuan、Huang Xicheng、Shimada Takahiro、Kitamura Takayuki
  • Journal Title: Journal of Thermal Stresses Volume: 45 Issue: 1 Pages: 65-80
  • DOI: 10.1080/01495739.2021.2000343
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Atomistic investigation on the conversion of plastic work to heat in high-rate shear deformation (2022)
  • Author(s): Xiong Qi-lin、Li Zhenhuan、Shimada Takahiro、Kitamura Takayuki
  • Journal Title: International Journal of Plasticity Volume: 149 Pages: 103158-103158
  • DOI: 10.1016/j.ijplas.2021.103158
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Reversible control of intrinsic shear strength of a ZnO single crystal through electron-beam-induced hole state (2021)
  • Author(s): Hirakata Hiroyuki、Sano Kyohei、Shimada Takahiro
  • Journal Title: Journal of Materials Research Volume: 36 Issue: 21 Pages: 4438-4448
  • DOI: 10.1557/s43578-021-00399-9
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Interlaminar Fracture Toughness Measurement of Multilayered 2D Thermoelectric Materials Bi2Te3 by a Tapered Cantilever Bending Experiment (2021)
  • Author(s): Wang P.、Wang K. F.、Wang B. L.、Xi L.、Sano K.、Shimada T.、Hirakata H.、Fang D. N.
  • Journal Title: Experimental Mechanics Volume: 62 Issue: 1 Pages: 165-180
  • DOI: 10.1007/s11340-021-00761-2
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Flexoelectric properties of multilayer two-dimensional material MoS₂ (2021)
  • Author(s): Hirakata Hiroyuki、Fukuda Yasuyuki、Shimada Takahiro
  • Journal Title: Journal of Physics D: Applied Physics Volume: 55 Issue: 12 Pages: 125302-125302
  • DOI: 10.1088/1361-6463/ac4367
  • Peer Reviewed
• [Journal Article] The rectilinear motion of the individual asymmetrical skyrmion driven by temperature gradients (2021)
  • Author(s): Wang Yu、Shimada Takahiro、Wang Jie、Kitamura Takayuki、Hirakata Hiroyuki
  • Journal Title: Acta Materialia Volume: 221 Pages: 117383-117383
  • DOI: 10.1016/j.actamat.2021.117383
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Abnormal Electromechanical Property of Nonlinearly Graded Lead‐Free Ferroelectric Thin Films (2021)
  • Author(s): Lich Le Van、Bui Tinh Quoc、Shimada Takahiro、Kitamura Takayuki、Hong Hue Dang Thi、Nguyen Trong‐Giang、Dinh Van‐Hai
  • Journal Title: Advanced Theory and Simulations Volume: 5 Issue: 2 Pages: 2100370-2100370
  • DOI: 10.1002/adts.202100370
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Electrocaloric effect enhancement in compositionally graded ferroelectric thin films driven by needle to vortex domain structure transition (2021)
  • Author(s): Le Van Lich, Xu Hou, Manh-Huong Phan, Tinh Quoc Bui, Jie Wang, Takahiro Shimada, Takayuki Kitamura, and Van-Hai Dinh
  • Journal Title: Journal of Physics D: Applied Physics Volume: 54 Issue: 25 Pages: 255307-255307
  • DOI: 10.1088/1361-6463/abf0ed
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Emergence of non-trivial polar topologies hidden in singular stress field in SrTiO₃: topological strain-field engineering (2021)
  • Author(s): Shimada Takahiro、Wang Yu、Hamaguchi Takayuki、Kasai Kohta、Masuda Kairi、Van Lich Le、Xu Tao、Wang Jie、Hirakata Hiroyuki
  • Journal Title: Journal of Physics: Condensed Matter Volume: 33 Issue: 50 Pages: 505301-505301
  • DOI: 10.1088/1361-648x/ac28c1
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ferroelectric nanoscale logic gates by mixed dislocations in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>SrTiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> (2021)
  • Author(s): Masuda Kairi、Shimada Takahiro、Kitamura Takayuki
  • Journal Title: Physical Review B Volume: 104 Issue: 5 Pages: 054104-054104
  • DOI: 10.1103/physrevb.104.054104
  • Peer Reviewed
• [Journal Article] Dynamical topology in ferroelectric nanostructures by 1/2 [1-10] (110) dislocations in SrTiO3 (2021)
  • Author(s): Kairi Masuda, Takahiro Shimada, and Takayuki Kitamura
  • Journal Title: Physical Review B Volume: 103 Issue: 5 Pages: 054114-054114
  • DOI: 10.1103/physrevb.103.054114
  • Peer Reviewed
• [Journal Article] Shock response and defect evolution of copper single crystals at room and elevated temperatures (2021)
  • Author(s): Xiong Qi-Lin、Shimada Takahiro、Kitamura Takayuki、Li Zhenhuan
  • Journal Title: Modelling and Simulation in Materials Science and Engineering Volume: 29 Issue: 4 Pages: 045006-045006
  • DOI: 10.1088/1361-651x/abea68
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Energy storage and dissipation of elastic-plastic deformation under shock compression: Simulation and Analysis (2021)
  • Author(s): Xiong Qi-lin、Li Zhenhuan、Shimada Takahiro、Kitamura Takayuki
  • Journal Title: Mechanics of Materials Volume: 158 Pages: 103876-103876
  • DOI: 10.1016/j.mechmat.2021.103876
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Linear-superelastic Ti-Nb nanocomposite alloys with ultralow modulus via high-throughput phase-field design and machine learning (2021)
  • Author(s): Zhu Yuquan、Xu Tao、Wei Qinghua、Mai Jiawei、Yang Hongxin、Zhang Huiran、Shimada Takahiro、Kitamura Takayuki、Zhang Tong-Yi
  • Journal Title: npj Computational Materials Volume: 7 Issue: 1 Pages: 205-205
  • DOI: 10.1038/s41524-021-00674-7
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Rewritable material strength by electrons and holes (2023)
  • Author(s): Hiroyuki Hirakata, Takahiro Shimada
  • Organizer: Advanced Materials Research GRAND MEETING (MRM2023/IUMRS-ICA2023)
  • Int'l Joint Research / Invited
• [Presentation] Altering material strength by excess electrons and holes (2023)
  • Author(s): Hiroyuki Hirakata, Takahiro Shimada
  • Organizer: The 7th Joint-Symposium on Mechanics of Advanced Materials & Structures (JSMAMS 2023)
  • Int'l Joint Research / Invited
• [Presentation] Rewritable high fracture toughness of silica glass by injection and removal of electrostatic charge (2023)
  • Author(s): Wataru Matsunaga, Seiya Shichino, Hiroyuki Hirakata
  • Organizer: The Advanced Technology in Experimental Mechanics and International DIC Society Joint Conference 2023 (ATEM iDICs 2023)
  • Int'l Joint Research
• [Presentation] Effects of excess electrons/holes on elastic properties of van der Waals stacked materials (2023)
  • Author(s): Atsuki Kiyonaga, Wataru Matsunaga, Hiroyuki Hirakata
  • Organizer: The Advanced Technology in Experimental Mechanics and International DIC Society Joint Conference 2023 (ATEM iDICs 2023)
  • Int'l Joint Research
• [Presentation] 余剰電子／ホールドープによるファンデルワールス原子層積層材料の弾性特性変化 (2023)
  • Author(s): 清永敦生, 松永航, 平方寛之
  • Organizer: 日本機械学会2023年度年次大会
• [Presentation] 静電気の注入・除去によるアモルファスシリカの破壊じん性制御 (2023)
  • Author(s): 松永航, 七野誠哉, 高橋拓眞, 平方寛之
  • Organizer: 日本機械学会M&M2023材料力学カンファレンス
• [Presentation] 絶縁体SiO2と半導体Siの界面強度に及ぼす余剰電子/ホール効果の実験的評価 (2023)
  • Author(s): 河田圭吾, 平方寛之, 松永航
  • Organizer: 日本機械学会M&M2023材料力学カンファレンス
• [Presentation] 物質中の力の原子軌道分解法の開発 (2023)
  • Author(s): 阿部能将, 見波将, 嶋田隆広
  • Organizer: 第8回マルチスケール材料力学シンポジウム
• [Presentation] LCAO法に基づく応力の原子軌道分解法の開発 (2023)
  • Author(s): 阿部能将，坂口竣平，見波将，嶋田隆広
  • Organizer: 日本機械学会 第36回計算力学講演会（CMD2023）
• [Presentation] Nanomechanics on rewritable material strength by anomalous electron (2022)
  • Author(s): Hiroyuki Hirakata, Kyohei Sano, Shigekazu Homma, Takahiro Shimada
  • Organizer: 10th International Conference on Materials structure & Micromechanics of Fracture (MSMF10), Brno, Chech Republic
  • Int'l Joint Research / Invited
• [Presentation] 電子によるリライタブル材料強度 (2022)
  • Author(s): 平方寛之
  • Organizer: 日本材料学会第2回マルチスケールマテリアルモデリングシンポジウム（第7 回マルチスケール材料力学シンポジウム）
  • Invited
• [Presentation] 材料強度の電子的制御とその量子論的力学機構 (2022)
  • Author(s): 嶋田 隆広, 野田 大樹, 藤田 涼雅, 平方 寛之
  • Organizer: 粉体粉末冶金協会 粉体粉末冶金協会2022年度春季大会（第129回講演大会）
  • Invited
• [Presentation] First-principles Study of Quantum Electronic Strengthening of Covalent Materials by Excess Electrons/Holes (2022)
  • Author(s): Hiroki Noda, Shumpei Sakaguchi, Hiroyuki Hirakata, Takahiro Shimada
  • Organizer: 日本材料学会 ICMR2022
  • Int'l Joint Research
• [Presentation] Phase-field Simulation of Mechanically Induced Polar Skyrmions in PbTiO3 Ultrathin Films (2022)
  • Author(s): Kohta Kasai, Takashi Nojima, Hiroyuki Hirakata, Takahiro Shimada
  • Organizer: 日本材料学会 ICMR2022
  • Int'l Joint Research
• [Presentation] Temperature Dependence of the Magnetic Skyrmion-Skyrmion Interaction: A Phase-Field Study (2022)
  • Author(s): Yu Wang, Jie Wang, Takayuki Kitamura, Hiroyuki Hirakata, Takahiro Shimada
  • Organizer: 日本材料学会 ICMR2022
  • Int'l Joint Research
• [Presentation] 第一原理解析に基づく結晶材料の量子的強化機構の体系的理解と化学結合論的視点からの分類 (2022)
  • Author(s): 野田大樹, 坂口竣平, 嶋田隆広, 平方寛之
  • Organizer: 日本材料学会第2回マルチスケールマテリアルモデリングシンポジウム（第7 回マルチスケール材料力学シンポジウム）
• [Presentation] 強誘電体ナノ薄膜への押し込みによる分極スキルミオン組織形成に関するPhase-field解析 (2022)
  • Author(s): 笠井 恒汰, 野島 崇志, 平方寛之, 嶋田隆広
  • Organizer: 日本機械学会第35回計算力学講演会(CMD2022), Web開催（鹿児島大学）
• [Presentation] 電子ドープによる結晶の弾性特性変化に関する第一原理解析 (2022)
  • Author(s): 嶋田隆広, 藤田涼雅, 平方寛之
  • Organizer: 日本機械学会第35回計算力学講演会(CMD2022), Web開催（鹿児島大学）
• [Presentation] 第一原理解析に基づく共有結合性半導体材料の電子的強化機の構明 (2022)
  • Author(s): 野田 大樹, 坂口竣平, 平方寛之, 嶋田隆広
  • Organizer: 日本機械学会第35回計算力学講演会(CMD2022), Web開催（鹿児島大学）
• [Presentation] Phase-Field Simulations on Temperature-Related Behaviors of Skyrmions (2021)
  • Author(s): Yu Wang, Takahiro Shimada, Shizhe Wu, Yuelin Zhang, Jinxing Zhang, Jie Wang, Hiroyuki Hirakata
  • Organizer: 2021 MRS Fall Meeting & Exhibits (Virtual)
  • Int'l Joint Research
• [Presentation] Quantum polar skyrmions/merons in doped SrTiO3 heterostructures: a topological polaron (2021)
  • Author(s): Takahiro Shimada, Yuuki Ichiki, Tao Xu, Le Van Lich, Jie Wang, Hiroyuki Hirakata
  • Organizer: 2021 MRS Fall Meeting & Exhibits (Virtual)
  • Int'l Joint Research
• [Presentation] 単結晶Siの破壊じん性に及ぼす電子ビーム照射の影響 (2021)
  • Author(s): 本間成和, 嶋田隆広, 平方寛之
  • Organizer: 日本材料学会第20回破壊力学シンポジウム
• [Presentation] 共有結合性結晶材料の理想引張り強度に及ぼす余剰電子/ホール効果に関する第一原理解析 (2021)
  • Author(s): 野田大樹, 坂口竣平, 嶋田隆広, 平方寛之
  • Organizer: 日本材料学会第6回材料WEEK「材料シンポジウム」ワークショップ
• [Presentation] イオン結合性材料のせん断強度に及ぼす余剰電子/ホールの影響 (2021)
  • Author(s): 七野誠哉, 佐野恭兵, 嶋田隆広, 平方寛之
  • Organizer: 日本材料学会第6回材料WEEK「材料シンポジウム」ワークショップ
• [Presentation] 余剰電子/ホール制御による材料強度書き換え特性 (2021)
  • Author(s): 平方寛之, 佐野恭兵, 嶋田隆広
  • Organizer: 日本機械学会第34回計算力学講演会
• [Presentation] 第一原理電子軌道応力解析法の開発 (2021)
  • Author(s): 嶋田隆広, 藤田涼雅, 坂口竣平, 椎原良典, 平方寛之
  • Organizer: 日本機械学会第34回計算力学講演会
• [Presentation] Anomalous 電子による材料強度書き換えのナノ力学 (2021)
  • Author(s): 平方寛之, 佐野恭兵, 嶋田隆広
  • Organizer: 日本機械学会M&M2021材料力学カンファレンス
• [Presentation] 第一原理電子応力解析法の開発と結晶材料への適用 (2021)
  • Author(s): 藤田涼雅, 坂口竣平, 嶋田隆広, 椎原良典, 平方寛之
  • Organizer: 日本機械学会M&M2021材料力学カンファレンス
• [Presentation] SrTiO3表面の電子Polaronによる強誘電Skyrmionの創出とその力学的制御 (2021)
  • Author(s): 嶋田隆広, 市木佑樹, 平方寛之
  • Organizer: 日本機械学会M&M2021材料力学カンファレンス
• [Presentation] 電子応力概念の提案と第一原理電子応力解析法の開発 (2021)
  • Author(s): 藤田涼雅, 坂口竣平, 嶋田隆広, 平方寛之
  • Organizer: 日本材料学会第6回マルチスケール材料力学シンポジウム
• [Presentation] イオン結合性材料の理想引張り強度に及ぼす余剰電子/ホール効果に関する第一原理解析 (2021)
  • Author(s): 野田大樹, 坂口竣平, 嶋田隆広, 平方寛之
  • Organizer: 日本材料学会第6回マルチスケール材料力学シンポジウム
• [Presentation] 材料の結合強度に及ぼす Anomalous 電子の影響 (2020)
  • Author(s): 平方寛之, 佐野恭兵, 嶋田隆広
  • Organizer: 日本機械学会2020年度年次大会
• [Remarks] 京都大学・固体力学研究室
  • URL: https://msr.me.kyoto-u.ac.jp/
• [Remarks] 京都大学・材料物性学研究室
  • URL: https://material.me.kyoto-u.ac.jp/
• [Remarks] 京都大学固体力学研究室
  • URL: https://msr.me.kyoto-u.ac.jp/
• [Remarks] 京都大学材料物性学研究室
  • URL: https://material.me.kyoto-u.ac.jp/
• [Remarks] 京都大学固体力学研究室
  • URL: http://msr.me.kyoto-u.ac.jp/