コース名 物理学コース
領域名 量子多体系物理学領域
教員名 太田 幸則
電子メール ohta理faculty.chiba-u.jp
※メール送信の際は、「理」を半角@に変更してください。
ホームページ http://physics.s.chiba-u.ac.jp/ohtal/
(1) 研究論文など
原著論文
1. Theory of the Lightly Doped Mott Insulator, R. Eder, P. Wróbel, and Y. Ohta, Phys. Rev. B 82, 155109/1-10 (2010).
2. Theory of the Waterfall Phenomenon in Cuprate Superconductors, D. Katagiri, K. Seki, R. Eder, and Y. Ohta, Phys. Rev. B 83, 165124/1-11 (2011).
3. Quasi-One-Dimensional Electronic Structure of Hollandite Ruthenate K2Ru8O16, T. Toriyama, M. Watanabe, T. Konishi, and Y. Ohta, Phys. Rev. B 83, 195101/1-6 (2011).
4. Mott Transition and Ferrimagnetism in the Hubbard Model on the Anisotropic Kagomé Lattice, A. Yamada, K. Seki, R. Eder, and Y. Ohta, Phys. Rev. B 83, 195127/1-5 (2011).
5. Self-Energy and Fermi Surface of the Two-Dimensional Hubbard Model, R. Eder, K. Seki, and Y. Ohta, Phys. Rev. B 83, 205137/1-17 (2011).
6. Spin Gap of the Three-Leg S=3/2 Heisenberg Tube, S. Nishimoto, Y. Fuji, and Y. Ohta, Phys. Rev. B 83, 224425/1-5 (2011).
7. Peierls Mechanism of the Metal-Insulator Transition in Ferromagnetic Hollandite K2Cr8O16, T. Toriyama, A. Nakao, Y. Yamaki, H. Nakao, Y. Murakami, K. Hasegawa, M. Isobe, Y. Ueda, A. V. Ushakov, D. I. Khomskii, S. V. Streltsov, T. Konishi, and Y. Ohta, Phys. Rev. Lett, in press (2011).
8. A BCS-BEC Crossover in the Extended Falicov-Kimball Model: Variational Cluster Approach, K. Seki, R. Eder, and Y. Ohta, Phys. Rev. B, submitted (2011).
9. Electronic Structure of Layered Chalcogenide Ta2NiSe5 as a Candidate for Excitonic Insulators, T. Kaneko, T. Toriyama, Y. Ohta, and T. Konishi, Phys. Rev. B, submitted (2011).
10. An Exact Solution of the One-Dimensional Double-Exchange Model with One Electron, K. Nakano, R. Eder, and Y. Ohta, Phys. Rev. B, submitted (2011).
11. Potential Antiferromagnetic Fluctuations in Hole-Doped Iron-Pnictide Superconductor Ba1-xKxFe2As2 Studied by 75As Nuclear Magnetic Resonance, M. Hirano, Y. Yamada, T. Saito, R. Nagashima, T. Konishi, T. Toriyama, Y. Ohta, H. Fukazawa, Y. Kohori, Y. Furukawa, K. Kihou, C.-H. Lee, A. Iyo, and H. Eisaki, J. Phys. Soc. Jpn., submitted (2011).
国際会議録
12. A New Half-Metallic Ferromagnet K2Cr8O16 Predicted by an Ab-Initio Electronic Structure Calculation, M. Sakamaki, T. Konishi, T. Shirakawa, and Y. Ohta, J. Phys.: Conf. Ser. 200, 012172/1-4 (2010).
13. Magnetic Susceptibility and Saturation Magnetic Field in the t-J2-J3-K Model: 3He on Graphite, K. Seki and Y. Ohta, J. Phys.: Conf. Ser. 200, 022056/1-4 (2010).
14. Nonquasiparticle States in the Half-Metallic Ferromagnet Simulated by the Two-Band Hubbard Model, K. Nakano, T. Shirakawa, and Y. Ohta, J. Phys.: Conf. Ser. 200, 012143 (2010).
15. Zero-Point Vacancies in the Two-Dimensional t-J2-J3-J4 Model: 3He on Graphite, K. Seki and Y. Ohta, Physica C 470, S970-S971 (2010).
16. Anomalous Electronic States of Hollandite-Type Transition-Metal Oxides, Y. Ohta, T. Toriyama, M. Sakamaki, and T. Konishi, J. Phys.: Conf. Ser., in press (2011).
17. A BCS-BEC Crossover in the Extended Falicov-Kimball Model: Variational Cluster Approach, K. Seki, S. Yamaki, T. Kaneko, R. Eder, and Y. Ohta, J. Phys.: Conf. Ser., in press (2011).
18. Mott Transition in the Hubbard Model on the Anisotropic Kagomé Lattice: Variational Cluster Approach, A. Yamada, K. Seki, R. Eder, and Y. Ohta, J. Phys.: Conf. Ser., in press (2011).
19. Exact Wave Functions and Excitation Spectra of the One-Dimensional Double-Exchange Model with One Mobile Electron, K. Nakano, R. Eder, and Y. Ohta, in press (2011).
20. Ground State Properties of the S=3/2 Three-Leg Heisenberg Tube, Y. Fuji, S. Nishimoto, and Y. Ohta, J. Phys.: Conf. Ser., in press (2011).
21. Electronic Structure of Ta2NiSe5 as a Candidate for Excitonic Insulators, T. Kaneko, T. Toriyama, T. Konishi, and Y. Ohta, J. Phys.: Conf. Ser., in press (2011).
22. Hollandite Ruthenate K2Ru8O16 as a New Tomonaga-Luttinger-Liquid System, T. Toriyama, M. Watanabe, T. Konishi, and Y. Ohta, J. Phys.: Conf. Ser., in press (2011).
23. Mechanism of the Metal-Insulator Transition of Hollandite Vanadate K2V8O16, T. Toriyama, T. Konishi, and Y. Ohta, J. Phys.: Conf. Ser., in press (2011).
24. Variational Cluster Approach to the Extended Falicov-Kimball Model: A BCS-BEC Crossover in the Excitonic Insulators, K. Seki, S. Yamaki, T. Kaneko, R. Eder, and Y. Ohta, J. Phys.: Conf. Ser., in press (2011).
25. Excitation Spectra of the One-Dimensional Double-Exchange Model: An Exact Solution for One Mobile Electron, K. Nakano, R. Eder, and Y. Ohta, J. Phys.: Conf. Ser., in press (2011).
26. Anomalous Electronic Structure of Transition-Metal Oxides with Hollandite-Type Crystal Structure, T. Toriyama, T. Konishi, and Y. Ohta, J. Phys.: Conf. Ser., in press (2011).
27. Hubbard Model on the Anisotropic Kagomé Lattice: Mott Transition and Ferrimagnetism, A. Yamada, K. Seki, R. Eder, and Y. Ohta, J. Phys.: Conf. Ser., in press (2011).
総説
なし
(2) 特別研究などの指導実績： 卒業研究（学士）、大学院修士および博士学位取得人数
卒業研究（理学士） 4 大学院修士 1 大学院博士 0
(3) 国際会議出席と招待リスト
国際会議名 開催国 年月日 論文名
1. 日本物理学会2010年秋季大会シンポジウム (2010年9月，大阪府立大学)「New Materials and Mechanisms of Metal-Insulator Transitions in Transition-Metal Compounds -- Hollandites: Theoretical Aspects」
2. 構造物性研究センター研究会「強相関電子系における軌道混成秩序とその外場応答の現状と今後の展開」 (2011年1月14-15日, KEK物質構造研究センター) 「強磁性K2Cr8O16のMI転移の起源」
3. International Conference on Low Temperature Physics (LT26-Beijing), China, 10-17 August 2011, Anomalous Electronic States of Hollandite-Type Transition-Metal Oxides
4. International Conference on Low Temperature Physics (LT26-Beijing), China, 10-17 August 2011, A BCS-BEC Crossover in the Extended Falicov-Kimball Model: Variational Cluster Approach
5. International Conference on Low Temperature Physics (LT26-Beijing), China, 10-17 August 2011, Mott Transition in the Hubbard Model on the Anisotropic Kagomé Lattice: Variational Cluster Approach
6. International Conference on Low Temperature Physics (LT26-Beijing), China, 10-17 August 2011, Exact Wave Functions and Excitation Spectra of the One-Dimensional Double- Exchange Model with One Mobile Electron
7. International Conference on Low Temperature Physics (LT26-Beijing), China, 10-17 August 2011, Ground State Properties of the S=3/2 Three-Leg Heisenberg Tube
8. International Conference on Low Temperature Physics (LT26-Beijing), China, 10-17 August 2011, Electronic Structure of Ta2NiSe5 as a Candidate for Excitonic Insulators
9. International Conference on Low Temperature Physics (LT26-Beijing), China, 10-17 August 2011, Hollandite Ruthenate K2Ru8O16 as a New Tomonaga-Luttinger-Liquid System
10. International Conference on Low Temperature Physics (LT26-Beijing), China, 10-17 August 2011, Anomalous Electronic States of Hollandite-Type Transition-Metal Oxides Mechanism of the Metal-Insulator Transition of Hollandite Vanadate K2V8O16
11. International Conference on Strongly Correlated Electron Systems (SCES2011), Cambridge, UK, 29 August - 3 September 2011, Cambridge, UK, Variational Cluster Approach to the Extended Falicov-Kimball Model: A BCS-BEC Crossover in the Excitonic Insulators
12. International Conference on Strongly Correlated Electron Systems (SCES2011), Cambridge, UK, 29 August - 3 September 2011, Cambridge, UK, Excitation Spectra of the One- Dimensional Double-Exchange Model: An Exact Solution for One Mobile Electron
13. International Conference on Strongly Correlated Electron Systems (SCES2011), Cambridge, UK, 29 August - 3 September 2011, Cambridge, UK, Anomalous Electronic Structure of Transition-Metal Oxides with Hollandite-Type Crystal Structure
14. International Conference on Strongly Correlated Electron Systems (SCES2011), Cambridge, UK, 29 August - 3 September 2011, Cambridge, UK, Hubbard Model on the Anisotropic Kagomé Lattice: Mott Transition and Ferrimagnetism
(4) 教育業績
1. 統計物理学演習のテキスト「演習で学ぶ統計力学」2010年度版の作成、生協での販売
2. Moodle2010ウェッブ上で 「統計物理バーチャルセミナー」 の運営
(5) 学会、国、県などへの協力，地域・社会と連携した教育・研究活動など教育
1. 2011年8月2-3日 千葉大学理学部物理サマースクール「摩擦のない世界： 超伝導・超流動」で講義担当
2. 2011年6月−現在 Member of the Editorial Board of “ISRN Condensed Matter Physics” (Hindawi Publishing).
3. 独立行政法人 新エネルギー・産業技術総合開発機構（NEDO）の 「産業技術研究助成業」に係るピアレビューア
(6) 特許（発明者名、発明の名称、出願日、出願番号、整理番号等）
なし
(7) その他
なし