Rattling Phonon and Superconductivity

2009 Fiscal Year Final Research Report

• Project/Area Number: 18204030
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: TANIGAKI Katsumi Tohoku University, 原子分子材料科学高等研究機構, 教授 (60305612)
• Co-Investigator(Kenkyū-buntansha): RYOTARO Kumashiro 東北大学, 大学院・理学研究科, 助教 (00396417) ; MATSUOKA Eiichi 東北大学, 高等教育開発推進センター, 助教 (20400228) ; KIMURA Noriaki 東北大学, 大学院・理学研究科, 助教 (30292311)
• Project Period (FY): 2006 – 2009
• Keywords: クラスレート / ナノ材料 / フォノン / 電導 / 物性実験 / 熱伝導

Research Abstract

The Effects of rattling phonons created by the anharmonic atomic motions accommodated in a nano cage structure are studied focusing on superconductivity via electron-phonon interactions. In the case of local Jahn Teller distortion in the Ge_<100> cage structure, a large reduction in the density of states at the Fermi level occurs to lower the superconducting transition temperature T_c, which cannot be observed in the Si_<100> structure. For the rigid cage structure of Ga16Ge30, the Jahn Teller distortion is suppressed and, instead, the rearrangement in crystal sites of the constituent atoms occurs leading to anharmonic potentials on the endohedral atoms. In such a situation enhanced electron-phonon interactions can be anticipated.

Research Products

• [Journal Article] Light emitting ambipolar field-effect transistors of 2,5-bis(4-biphenyl) bithiophene single crystals with anisotropic carrier mobilities (2009)
  • Author(s): Yan Wang, Ryotaro Kumashiro, Zhaofei Li, Ryo Nouchi, Katsumi Tanigaki
  • Journal Title: Appl.Phys.Lett. 95 Pages: 103306
  • Peer Reviewed
• [Journal Article] Rotational Sub-level of Ortho-Hydrogen Molecule Encapsulated in Isotropic C60 Fullerene Cages (2009)
  • Author(s): Yoshimitsu Kohama, Takeshi Rachi, Ju Jing, Zhaofei Li, Jun Tang, Ryotaro Kumashiro, Satoru Izumisawa, Hitoshi Kawaji, Tooru Atake, Hiroshi Sawa, Yasujiro Murata, Koichi Komatsu, Katsumi Tanigaki
  • Journal Title: Phys.Rev.Lett. 102 Pages: 013001-013004
  • Peer Reviewed
• [Journal Article] Influence of interface modifications on carrier mobilities in rubrene single crystal ambipolar field-effect transistor (2009)
  • Author(s): Yan Wang, Ryotaro Kumashiro, Ryo Nouchi, Naoya Komatsu, Katsumi Tanigaki
  • Journal Title: J.Appl.Phys. 105 Pages: 124912
  • Peer Reviewed
• [Journal Article] A structural study of the hole-doped superconductors Pr1-xSrxFeAsO (2009)
  • Author(s): Ju Jing, Mu Gang, Zhaofei Li, Masanori Watahiki, Kazumi Sato, Heihu Wen, Katsumi Tanigaki
  • Journal Title: New J.Physics 11 Pages: 083003
  • Peer Reviewed
• [Journal Article] p- and n-Type Ba8Ga16Ge30 studied by X-ray photoelectron spectroscopy (2009)
  • Author(s): Jun Tang, Ryotaro Kumashiro, Jing Ju, Zhaofei Li, Marcos A. Avila, Kouichirou Suekuni, Toshiro Takabatake, Fangzhun Guo, Keisuke Kobayashi, Katsumi Tanigaki
  • Journal Title: Chemical Physics Letters 472 Pages: 62-64
  • Peer Reviewed
• [Journal Article] Stacking-fault structure explains unusual elasticity of nanocrystalline diamonds (2009)
  • Author(s): H. Tanei, K. Tanigaki, K. Kusakabe
  • Journal Title: Chem.Phys.Letters 94 Pages: 041914
  • Peer Reviewed
• [Journal Article] Soft x-ray photoelectron spectroscopy study of type-I clathrates (2009)
  • Author(s): Jun Tang, Zhaofei Li, Jing Ju, Ryotaro Kumashiro, Marcos A. Avila, Kouichirou Suekuni, Toshiro Takabatake, FangZhun Guo, Keisuke Kobayashi, Koji Akai, Katsumi Tanigaki
  • Journal Title: Sci.Technol.Adv.Mater. 9 Pages: 044207-044211
  • Peer Reviewed
• [Journal Article] Ge-73- and Ba-135/137-NMR Studies of Clathrate Superconductor Ba24Ge100 (2009)
  • Author(s): F. Kanetake, A. Harada A, H. Mukuda, Kitaoka, T. Rachi, K. Tanigaki
  • Journal Title: J.Phys.Soc.Jpn 78 Pages: 104710
  • Peer Reviewed
• [Journal Article] Nanorods of Endohedral Metallofullerene Derivative (2008)
  • Author(s): Takahiro Tsuchiya, Ryotaro Kumashiro, Katsumi Tanigaki, Yoichiro Matsunaga, Midori O.Ishitsuka, Takatsugu Wakahara, Yutaka Maeda, Yuta Takano, Motoki Aoyagi, Takeshi Akasaka, Michael T.H.Liu, Tatsuhisa Kato, Kazutomo Suenaga, Jong S.Jeong, Sumio Iijima, Fumiko Kimura, Tsunehisa Kimura, Shigeru Nagase
  • Journal Title: J.Am.Chem.Soc. 130 Pages: 450-451
  • Peer Reviewed
• [Journal Article] FET properties of Chemically modified Carbon nanotubes (2008)
  • Author(s): R. Kumashiro, N. Hiroshiba, N. Komatsu, T. Akasaka, Y. Maeda, S. Suzuki, Y. Achiba, R. Hatakeyama, K. Tanigaki
  • Journal Title: J.Phys.Chem.Solid 69 Pages: 1206
  • Peer Reviewed
• [Journal Article] Energetics of endohedral atoms in type-I clathrates observed by soft x-ray spectroscopy (2008)
  • Author(s): Takeshi Rachi, Jun Tang, Ryotaro Kumashiro, Marcos A. Avila, Kouichirou Suekuni, Toshiro Takabatake, FangZhun Guo, Keisuke Kobayashi, Koji Akai, Katsumi Tanigaki
  • Journal Title: Phys.Rev.B 78(8) Pages: 085203
  • Peer Reviewed
• [Journal Article] Soft x-ray photoelectron spectroscopy study of type-I clathrates (2008)
  • Author(s): Jun Tang, Zhaofei Li, Jing Ju, Ryotaro Kumashiro, Marcos A. Avila, Kouichirou Suekuni, Toshiro Takabatake, FangZhun Guo, Keisuke Kobayashi, Koji Akai, Katsumi Tanigaki
  • Journal Title: J.Sci and Tech.Advanced Mater 9 Pages: 044207
  • Peer Reviewed
• [Journal Article] Switchable Semiconductive Property of the Polyhydroxylated Metallofulleren (2007)
  • Author(s): Jun Tang, Gengmei Xing, Yuliang Zhao, Long Jing, Hui Yuan, Feng Zhao, Xueyun Gao, Haijie Qian, Run Su, Kurash Ibrahim, Weiguo Chu, Lina Zhang, Katsumi Tanigaki
  • Journal Title: J.Phys.Chem.B 111(41) Pages: 11929-34
  • Peer Reviewed
• [Journal Article] Missing superconductivity in BaAlSi with the A1B2 type structure (2007)
  • Author(s): Shoji Yamanaka, Teruyoshi Otsuki, Takayuki Ide, Hiroshi Fukuoka, Ryotaro Kumashiro, Takeshi Rachi, Katsumi Tanigaki, FangZhun Guo, Keisuke Kobayashi
  • Journal Title: Physica C 451 Pages: 19-23
  • Peer Reviewed
• [Journal Article] Superconducting phase sequence in RxC60 fullerides (R=Sm and Yb) (2006)
  • Author(s): Misaho Akada, Toshinari Hirai, Junji Takeuchi, Takao Yamamoto, Katsumi Tanigaki
  • Journal Title: Phys.Rev.B 73 Pages: 094509
  • Peer Reviewed
• [Journal Article] Specific heat capacity and magnetic susceptibility of superconducting Ba24Si100 (2006)
  • Author(s): Takeshi Rachi , Katsumi Tanigaki, Ryotaro Kumashiro, Kensuke Kobayashi, Harukazu Yoshino, Keizo Murata, Hiroshi Fukuoka, Syoji Yamanaka, Hidekazu Shimotani, Taishi Takenobu , Yoshihiro Iwasa, Takahiko Sasaki, Norio Kobayashi, Yuji Miyazaki, Kazuya Saito
  • Journal Title: J.Physics and Chemistry of Solids 67 Pages: 1334-1337
  • Peer Reviewed
• [Journal Article] Rubrene single crystal field-effect transistor with epitaxial BaTiO3 high-k gate insulator (2006)
  • Author(s): Nobuya Hiroshiba, Ryotaro Kumashiro, Katsumi Tanigaki, Taishi Takenobu, Yoshihiro Iwasa, Kenta Kotani, Iwao Kawayama, Masayoshi Tonouchi
  • Journal Title: Appl.Phys.Letters 89 Pages: 152110-152113
  • Peer Reviewed
• [Journal Article] Ferromagnetic ordering in a new nickel polyborate NiB12O14(OH)10 (2006)
  • Author(s): J. Ju, J. Sasaki, T. Yang, S. Kasamatsu, E. Negishi, G. Li, J. Lin, H. Nojiri, T. Rachi, K. Tanigaki, N. Toyota
  • Journal Title: Dalton Trans Pages: 1597-1601
  • Peer Reviewed
• [Journal Article] Sp3-network superconductors made from IVth-group elements (2006)
  • Author(s): T. Rachi, R. Kumashiro, K. Tanigaki, H. Fukuoka, S. Yamanaka
  • Journal Title: J.Sci.Tech.Ad.Mter. Special Issue 7S1 Pages: S88-S93
  • Peer Reviewed
• [Journal Article] Electric Transport and Modulated Density of States in Rotational Order and Disorder in Na2CsC60 (2006)
  • Author(s): M. Akada, T. Yamamoto, R. Kumashiro, A. Hojyo, H. Matsui, N. Toyota, J. P. Lu, K. Tanigaki
  • Journal Title: Multifunctional Conducting Molecular Materials(eds. G. Saito, et al.)(Royal Society of Chemistry, Cambride, U.K.) Pages: 191-197
  • Peer Reviewed
• [Presentation] Phonons and electronic states in compounds with regulated nanospaces (2009)
  • Author(s): Katsumi Tanigaki
  • Organizer: The 4^<th> Hiroshima Workshop on Sustainable Materials Science
  • Place of Presentation: Faculty Club, Hiroshima University, Higashi-Hiroshima, Japan
  • Year and Date: 2009-11-13
• [Presentation] Nanomaterials and Their Applications to Field Effect Transistors with Two Dimensional Electronic States (2009)
  • Author(s): Yan Wang, R. Kumashiro, Susumu Ikeda, Katsumi Tanigaki
  • Organizer: AURE International Conference, POSCO International Center, POSTECH
  • Place of Presentation: Korea
  • Year and Date: 2009-11-13
• [Presentation] Role of phonons searching for good thermoelectricity and high Tc superconductivity (2009)
  • Author(s): Katsumi Tanigaki
  • Organizer: USB-RIEC Joint meeting
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2009-10-22
• [Presentation] Interplay between electrons and phonons searching for good thermoelectricity and high Tc superconductivity (2009)
  • Author(s): Katsumi Tanigaki
  • Organizer: International Conference on Intercalation Compounds
  • Place of Presentation: Beijing, China
  • Year and Date: 2009-05-11
• [Presentation] Physical Properties in Nano-Assembled Materials : Endohedral Atoms and Molecules in Confined Nanospaces (2009)
  • Author(s): Katsumi Tanigaki
  • Organizer: International Symposium ISIM- 2009 (International Symposium on Interdisciplinary Science)
  • Place of Presentation: Tsukuba International Conference Center, Japan
  • Year and Date: 2009-03-09
• [Presentation] Indo-Japan International Conference (2008)
  • Author(s): K. Tanigaki
  • Organizer: Physical Properties of Hydrogen Endohedral C60
  • Place of Presentation: Trivandrum, India
  • Year and Date: 2008-01-22
• [Presentation] Rubrene Single Crystal FETs on High Electric Gate Insulators (2007)
  • Author(s): Katsumi Tanigaki
  • Organizer: Alpen Winter Workshop
  • Place of Presentation: Swiss
  • Year and Date: 2007-12-17
• [Presentation] Network Polyhedra with Regulated Nanospace : Past, Present and Perspective Future (2007)
  • Author(s): Katsumi Tanigaki
  • Organizer: 21COE International Workshop : Towards a New Basic Science Depth and Synthesis
  • Place of Presentation: Osaka University
  • Year and Date: 2007-09-09
• [Presentation] Structure and Physical Properties of H2 Endohedral C60 (2007)
  • Author(s): Katsumi Tanigaki
  • Organizer: ICIS
  • Place of Presentation: Seoul, Korea
  • Year and Date: 2007-06-15
• [Presentation] Physical Properties of H2@C60 (2007)
  • Author(s): K. Tanigaki, T. Rachi, R. Kumashiro,Y. Murata, K. Komatsu, T. Kakiuchi, H. Sawa, Y. Kohama, S. Izumisawa, H. Kawaji, T. Atake
  • Organizer: 211^<th> Electrochemical Society Meeting
  • Place of Presentation: Chicago, USA
  • Year and Date: 2007-05-10
• [Presentation] 多面体物質のおけるフォノンと物性、シンポジウム依頼講演 (2007)
  • Author(s): 谷垣勝己
  • Organizer: 日本物理学会
  • Place of Presentation: 愛媛大学
  • Year and Date: 2007-03-25
• [Presentation] Structure and Electronic Properties of Silicon and Germanium Network Polyhedra (2006)
  • Author(s): K. Tanigaki, T. Rachi, R. Kumashiro, H. Fukuoka, S. Yamanaka
  • Organizer: 2006 MRS Fall Meeting
  • Place of Presentation: Boston, MA, USA
  • Year and Date: 2006-12-02
• [Book] クラスレートと熱電変換材料、熱電変換技術ハンドブック(監修 梶川武信) (2008)
  • Author(s): 谷垣勝己
  • Total Pages: 123-133
  • Publisher: NTS
• [Book] フラーレンの電子物性の薄膜電子素子への適用、ナノカーボンハンドブック(遠藤守信、飯島澄男監修) (2007)
  • Author(s): 谷垣勝己
  • Total Pages: 614-621
  • Publisher: NTS出版
• [Remarks] ホームページ等
  • URL: http://sspns.phys.tohoku.ac.jp/
• [Patent(Industrial Property Rights)] Conduction material for field effect transistor and laser, contains several metal endohedral fullerene consisting of regularly arranged aggregate and expressing specific polarity (2007)
  • Inventor(s): K. Akasaka, K. Wakahara ; T. Tsuchiya, K. Tanigaki
  • Industrial Property Rights Holder: Tsukuba University
  • Industrial Property Number: US PatentJP2007254195-A
  • Filing Date: 2007-02-10
• [Patent(Industrial Property Rights)] 金属内包フラーレン伝導材料及びその製造方法 (2006)
  • Inventor(s): 赤阪健, 若原孝次, 土屋敬広, 谷垣勝己, 熊代良太郎, 前田優
  • Industrial Property Rights Holder: 筑波大学
  • Industrial Property Number: 特願2006-078938
  • Filing Date: 2006-08-10
• [Patent(Industrial Property Rights)] 薬の誘導装置、磁気検出装置及び薬の設計方法 (2006)
  • Inventor(s): 江口春樹, 石川義弘, 谷垣勝己
  • Industrial Property Rights Holder: 石川播磨工業
  • Industrial Property Number: 特願2006-301564
  • Filing Date: 2006-10-05
• [Patent(Industrial Property Rights)] 磁性材料の誘導装置及び磁性材料の設計方法 (2006)
  • Inventor(s): 江口春樹, 石川義弘, 谷垣勝己
  • Industrial Property Rights Holder: 石川播磨工業
  • Industrial Property Number: 特願2006-30060
  • Filing Date: 2006-11-07