Orderings and fluctuations originated from multipole degrees of freedom

2012 Fiscal Year Final Research Report

• Project Area: Emergence of Heavy Electrons and Their Ordering
• Project/Area Number: 20102007
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: The University of Tokyo
• Principal Investigator: SAKAKIBARA Toshiro 東京大学, 物性研究所, 教授 (70162287)
• Co-Investigator(Kenkyū-buntansha): YOSHIZAWA Masahito 岩手大学, 工学研究科, 教授 (30220619) ; AOKI Yuji 首都大学東京, 理工学研究科, 教授 (20231772) ; TOKUNAGA Yo 日本原子力研究開発機構, 先端基礎研究センター, 研究員 (00354902)
• Co-Investigator(Renkei-kenkyūsha): UWATOKO Yoshiya 東京大学, 物性研究所, 准教授 (40213524) ; NAKATSUJI Satoru 東京大学, 物性研究所, 准教授 (70362431)
• Project Period (FY): 2008 – 2012
• Keywords: 強相関系 / 重い電子系 / 多極子

Research Abstract

In rare earth and actinoid compounds, f electrons may possess multipole moments, the complex degrees of freedom composed of spin and orbital. Like a magnetic moment in magnetic materials, multipole moments may exhibit a long-range ordering and play an essential role in low temperature properties of materials. In this research project, various new aspects of the multipole-related phenomena have been investigated. In particular, novel superconductivity mediated by multipole fluctuations has been discovered.

Research Products

• [Journal Article] High-Field Phase Diagram of SmRu4P12 Determined by Ultrasonic Measurements in Pulsed Magnetic Field up to 55 T (2013)
  • Author(s): M. Yoshizawa, H. Mitamura, F. Shichinomiya, S. Fukuda, Y. Nakanishi, H. Sugawara, T. Sakakibara, and K. Kindo
  • Journal Title: J. Phys. Soc. Jpn Volume: 82 Pages: 033602 (1-5)
  • DOI: DOI:10.7566/JPSJ.82.033602
  • Peer Reviewed
• [Journal Article] Evidence of a High-Field Phase in PrV_2Al_<20> in a [100] Magnetic Field (2013)
  • Author(s): Y. Shimura, Y. Ohta, T. Sakakibara, A. Sakai, and S. Nakatsuji
  • Journal Title: J. Phys. Soc. Jpn Volume: 82 Pages: 043705(1-4)
  • DOI: DOI:10.7566/JPSJ.82.043705
  • Peer Reviewed
• [Journal Article] Characterization of the Mysterious High Field Ordered Phase around H//[111] and Finding of a New Phase Boundary in PrFe_4P_<12> (2012)
  • Author(s): H. Aoki, H. Sato, D. Kikuchi, H. Sugawara, A. Pourret, K. Behnia, S. Uji, T. Terashima, R. Higashinaka, and Y. Aoki
  • Journal Title: J. Phys. Soc. Jpn Volume: 81 Pages: 084703 (1-11)
  • DOI: DOI:10.1143/JPSJ.81.084703
  • Peer Reviewed
• [Journal Article] Simultaneous superconducting and antiferroquadrupolar transitions in PrR_h2Zn_<20> (2012)
  • Author(s): T. Onimaru, N. Nagasawa, K. T. Matsumoto, K. Wakiya, K. Umeo, S. Kittaka, T. Sakakibara, Y. Matsushita, and T. Takabatake
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 184426(1-7)
  • DOI: DOI:10.1103/PhysRevB.86.184426
  • Peer Reviewed
• [Journal Article] Low Temperature Magnetization of Yb2Pt2Pb with the Shastry-Sutherland Type Lattice and a High-Rank Multipole Interaction (2012)
  • Author(s): Y. Shimura, T. Sakakibara, K. Iwakawa, K. Sugiyama, and Y. Onuki
  • Journal Title: J. Phys. Soc. Jpn Volume: 81 Pages: 103601(1-4)
  • DOI: DOI:10.1143/JPSJ.81.103601
  • Peer Reviewed
• [Journal Article] Pressure-Induced Heavy Fermion Superconductivity in the Nonmagnetic Quadrupolar System PrTi_2Al_<20> (2012)
  • Author(s): K. Matsubayashi, T. Tanaka, A. Sakai, S. Nakatsuji, Y. Kubo and Y. Uwatoko
  • Journal Title: Phys. Rev. Lett Volume: 109 Pages: 187004(1-5)
  • DOI: DOI:10.1103/PhysRevLett.109.187004
  • Peer Reviewed
• [Journal Article] Superconductivity in the Ferroquadrupolar State in the Quadrupolar Kondo Lattice PrTi_2Al_<20> (2012)
  • Author(s): A. Sakai, K. Kuga, and S. Nakatsuji
  • Journal Title: J. Phys. Soc. Jpn Volume: 81 Pages: 083702 (1-4)
  • DOI: DOI:10.1143/JPSJ.81.083702
  • Peer Reviewed
• [Journal Article] Anomalous elastic behavior and its correlation with superconductivity in iron-based superconductor Ba(Fe_<1-x>Co_x)_2As_2 (2012)
  • Author(s): M. Yoshizawa, and S. Simayi
  • Journal Title: Modern Phys. Lett. B Volume: 26 Pages: 1230011 (1-23)
  • DOI: DOI:10.1142/S0217984912300116
  • Peer Reviewed
• [Journal Article] 柔らかくなるほど高くなる超伝導体転移温度ー鉄系超伝導体における超伝導と構造揺らぎの不思議な関係ー (2012)
  • Author(s): 吉澤正人
  • Journal Title: 固体物理 Volume: 47 Pages: 309-319
• [Journal Article] 充填スクッテルダイトにおける多極子物性 (2012)
  • Author(s): 青木勇二, 菅原仁, 佐藤英行
  • Journal Title: 固体物理 Volume: 47 Pages: 637-649
• [Journal Article] カゴ状化合物 Pr1-2-20系における非クラマース二重項と多彩な相転移現象 (2012)
  • Author(s): 鬼丸孝博, 榊原俊郎
  • Journal Title: 固体物理 Volume: 47 Pages: 565-576
• [Journal Article] Heavy quasiparticles formed in the ferromagnetic Yb layers in the Kondo helical magnet YbNi_3Al_9 as revealed by specific-heat measurements (2012)
  • Author(s): R. Miyazaki, Y. Aoki, R. Higashinaka, H. Sato, T. Yamashita and S. Ohara
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 155106 (1-6)
  • DOI: DOI:10.1103/PhysRevB.86.155106
  • Peer Reviewed
• [Journal Article] Destruction of the Kondo effect in the cubic heavy-fermion compound Ce_3Pd_<20>Si_6 (2012)
  • Author(s): J. Custers, K-A. Lorenzer, M. Muller, A. Prokofiev, A. Sidorenko, H. Winkler, A. M. Strydom, Y. Shimura, T. Sakakibara, R. Yu, Q. Si and S. Paschen
  • Journal Title: Nat. Mater Volume: 11 Pages: 189-194
  • DOI: DOI:10.1038/nmat3214
  • Peer Reviewed
• [Journal Article] Ferroquadrupolar ordering in PrTi_2Al_<20> (2012)
  • Author(s): T. J. Sato, S. Ibuka, Y. Nambu, T. Yamazaki, T. Hong, A. Sakai, and S. Nakatsuji
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 184419 (1-8)
  • DOI: DOI:10.1103/PhysRevB.86.184419
  • Peer Reviewed
• [Journal Article] Superconducting gap structure of CeIrIn5 from field-angle-resolved measurements of its specific heat (2012)
  • Author(s): S. Kittaka, Y. Aoki, T. Sakakibara, A. Sakai, S. Nakatsuji, Y. Tsutsumi, M. Ichioka and K. Machida
  • Journal Title: Phys. Rev. B Volume: 85 Pages: 060505(R) (1-4)
  • DOI: DOI:10.1103/PhysRevB.85.060505
  • Peer Reviewed
• [Journal Article] Transport, Thermal, and Magnetic Properties of YbNi_3X_9 (X = Al, Ga): A Newly Synthesized Yb-Based Kondo Lattice System (2012)
  • Author(s): T. Yamashita, R. Miyazaki, Y. Aoki, and S. Ohara
  • Journal Title: J. Phys. Soc. Jpn Volume: 81(3) Pages: 034705(1-8)
  • DOI: DOI: 10.1143/JPSJ.81.034705
  • Peer Reviewed
• [Journal Article] Evidence of a Field-Induced Ordering in YbCo_2Zn_<20> in a [111] Magnetic Field (2011)
  • Author(s): Y. Shimura, T. Sakakibara, S. Yoshiuchi, F. Honda, R. Settai, and Y. Onuki
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 073707 (1-4)
  • DOI: DOI:10.1143/JPSJ.80.073707
  • Peer Reviewed
• [Journal Article] trong valence fluctuation effects in SmTr_2Al_<20> (Tr=Ti, V, Cr) (2011)
  • Author(s): A. Sakai and S. Nakatsuji
  • Journal Title: S, Phys. Rev. B Volume: 84 Pages: 201106(R) (1-5)
  • DOI: DOI:10.1103/PhysRevB.84.201106
  • Peer Reviewed
• [Journal Article] Effects and Multipolar Order in the Cubic PrTr_2Al_<20> (Tr =Ti, V) (2011)
  • Author(s): A. Sakai and S. Nakatsuji, Kondo
  • Journal Title: J. Phys. Soc. Jpn. Lett Volume: 80 Pages: 063701(1-4)
  • DOI: DOI:10.1143/JPSJ.80.063701
  • Peer Reviewed
• [Journal Article] Unusual Field-Insensitive Phase Transition and Kondo Behavior in SmTi_2Al_<20> (2011)
  • Author(s): R. Higashinaka, T. Maruyama, A. Nakama, R. Miyazaki, Y. Aoki and H. Sato
  • Journal Title: J. Phys. Soc. Jpn Volume: 80(9) Pages: 093703(1-4)
  • DOI: DOI:10.1143/JPSJ.80.093703
  • Peer Reviewed
• [Journal Article] NMR Determination of Noncollinear Antiferromagnetic Structure in TbCoGa_5 (2011)
  • Author(s): Y. Tokunaga, Y. Saito, H. Sakai, S. Kambe, N. Sanada, R. Watanuki, K. Suzuki, Y. Kawasaki, and Y. Kishimoto
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 214403(1-7)
  • DOI: DOI:10.1103/PhysRevB.84.214403
  • Peer Reviewed
• [Journal Article] Antiferroquadrupolar Ordering in a Pr-based SuperconductorPrIr_2Zn_<20> (2011)
  • Author(s): T. Onimaru, K. T. Matsumoto, Y. F. Inoue, K.Umeo, T. Sakakibara, Y. Karaki, M. Kubota, and T. Takabatake
  • Journal Title: Phys. Rev. Lett Volume: 106 Pages: 177001(1-4)
  • DOI: DOI:10.1103/PhysRevLett.106.177001
  • Peer Reviewed
• [Journal Article] μSR Evidence of Nonmagnetic Order and 141Pr Hyperfine-Enhanced Nuclear Magnetism in the Cubic Γ_3 Ground Doublet System PrTi_2Al_<20> (2011)
  • Author(s): T. U. Ito, W. Higemoto, K. Ninomiya, H. Luetkens, C. Baines, A. Sakai and S. Nakatsuji
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 113703(1-4)
  • DOI: DOI:10.1143/JPSJ.80.113703
  • Peer Reviewed
• [Journal Article] ^<237>Np nuclear relaxation rate in heavy fermion superconductor NpPd_5Al_2 (2011)
  • Author(s): H. Chudo, Y. Tokunaga, S. Kambe, H. Sakai, Y. Haga, T. D. Matsuda, Y. .nuki, H. Yasuoka, D. Aoki and Y. Homma, and R. E. Walstedt
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 094402(1-5)
  • DOI: DOI:10.1103/PhysRevB.84.094402
  • Peer Reviewed
• [Journal Article] f-Electron-Nuclear Hyperfine-Coupled Multiplets in the Unconventional Charge Order Phase of Filled Skutterudite PrRu_4P_<12> (2010)
  • Author(s): Y. Aoki, T. Namiki, S.R. Saha, T. Tayama, T. Sakakibara, R. Shiina, H. Shiba, H. Sugawara
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 054704(1-7)
  • DOI: DOI:10.1143/JPSJ.80.054704
  • Peer Reviewed
• [Journal Article] NMR Evidence for the 8.5 K Phase Transition in Americium Dioxide (2010)
  • Author(s): Y. Tokunaga, T. Nishi, S. Kambe, M. Nakada, A. Itoh, Y. Homma, H. Sakai, H. Chudo
  • Journal Title: J. Phys. Soc. Jpn Volume: 79 Pages: 053705(1-4)
  • DOI: DOI:10.1143/JPSJ.79.053705
  • Peer Reviewed
• [Journal Article] Elastic constants of the single crystalline Yb based heavy-fermion compound YbCo_2Zn_<20> (2009)
  • Author(s): Y. Nakanishi, T. Fujino, K. Ito, M. Nakamura, M. Yoshizawa, Y. Saiga, M. Kosaka, Y Uwatoko
  • Journal Title: Phys. Rev. B Volume: 80 Pages: 184418(1-6)
  • DOI: DOI:10.1103/PhysRevB.80.184418
  • Peer Reviewed
• [Journal Article] Unusual Low Temperature Magnetization of a Cubic Γ3 Non-Kramers Doublet Ground State Compound PrMg_3- Evidence of a Hybridization Effect (2009)
  • Author(s): T. Morie, T. Sakakibara, H.S. Suzuki, H. Tanida and S. Takagi
  • Journal Title: J. Phys. Soc. Jpn Volume: 78 Pages: 033705(1-4)
  • DOI: DOI:10.1143/JPSJ.78.033705
  • Peer Reviewed
• [Journal Article] Anomalous Field-Angle Dependence of the Specific Heat of Heavy-Fermion Superconductor Upt_3
  • Author(s): S. Kittaka, K. An, T. Sakakibara, Y. Haga, E. Yamamoto, N. Kimura, Y. Onuki, and K. Machida
  • Journal Title: J. Phys. Soc. Jpn Volume: 82 Pages: 024707(1-5)
  • DOI: DOI:10.7566/JPSJ.82.024707
  • Peer Reviewed
• [Presentation] Effect of pressure on the ferroquadrupole system PrTi_2Al_<20> (2013)
  • Author(s): Y. Uwatoko
  • Organizer: SMEC2013
  • Place of Presentation: Miami, USA
  • Year and Date: 2013-03-29
• [Presentation] Anomalous elastic properties in the iron-based superconductors Ba(Fe_<1-x>Co_x)_2As_2 and Fe(Se_<1-x>Te_x) (2012)
  • Author(s): M. Yoshizawa
  • Organizer: M2S 2012
  • Place of Presentation: Washington DC., USA
  • Year and Date: 2012-08-02
• [Presentation] Unusual heavy fermion behavior in PrTr_2Al_<20> (Tr = Nb, Ta) associated with Gamma_3 quadrupolar degrees of freedom (2012)
  • Author(s): R. Higashinaka, A. Nakama, R. Miyazaki, Y. Aoki and H. Sato
  • Organizer: ICM2012
  • Place of Presentation: Busan, Korea
  • Year and Date: 2012-07-12
• [Presentation] Pressure and Magnetic-Field Induced Non-Fermi-Liquid Behavior in YbCo_2Zn_<20> (2012)
  • Author(s): K. Matsubayashi
  • Organizer: ICM2012
  • Place of Presentation: Busan, Korea
  • Year and Date: 2012-07-12
• [Presentation] Magnetization steps in Yb_2Pt_2Pb with the Shastry-Sutherl and Lattice (2012)
  • Author(s): Y. Shimura, T. Sakakibara, K. Iwakawa, K. Sugiyama, and Y. Onuki
  • Organizer: ICM2012
  • Place of Presentation: Busan, Korea
  • Year and Date: 2012-07-10
• [Presentation] Singlet-triplet crossover in the two-dimensional dimer spin system YbAl_3C_3 (2012)
  • Author(s): S. Kittaka, T. Sugiyama, Y. Shimura, T. Sakakibara, S. Matsuda, and A. Ochiai
  • Organizer: ICM2012
  • Place of Presentation: Busan, Korea
  • Year and Date: 2012-07-10
• [Presentation] Solid-state NMR Study of Actinide Dioxides (2012)
  • Author(s): Y. Tokunaga, H. Sakai, and S. Kambe
  • Organizer: 2012 MRS Spring Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2012-04-11
• [Presentation] Elastic properties of iron-based superconductor (2011)
  • Author(s): M. Yoshizawa
  • Organizer: ISS2011
  • Place of Presentation: Tokyo
  • Year and Date: 2011-10-25
• [Presentation] Sign reversal of Field-Angle Resolved Heat Capacity Oscillations in a Heavy Fermion Superconductor CeCoIn_5 and d_<x2-y2> Pairing Symmetry (2011)
  • Author(s): T. Sakakibara
  • Organizer: The Korean Physical Society Autumn Meeting2011
  • Place of Presentation: Busan, Korea
  • Year and Date: 2011-10-20
• [Presentation] 充填スクッテルダイトにおける磁場の影響を受けない重い電子状態 (2011)
  • Author(s): 青木勇二
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-21
• [Presentation] NMR study of various actinide systems (2011)
  • Author(s): Y. Tokunaga
  • Organizer: J-Actinet Meeting 2011
  • Place of Presentation: Tohoku University Tokyo Office
  • Year and Date: 2011-09-02
• [Presentation] f-Electron-Nuclear Hyperfine-Coupled Multiplets of Pr Ions in Charge-Ordered Filled Skutterudite PrRu_4P_<12> (2011)
  • Author(s): Y. Aoki, T. Namiki, S.R. Saha, T. Tayama, T. Sakakibara, R. Shiina, H. Shiba, H. Sugawara and H. Sato
  • Organizer: SCES 2011
  • Place of Presentation: Cambridge, England
  • Year and Date: 2011-08-30
• [Presentation] Novel Quantum Phases in 4f electron based Kondo Lattice Systems (2011)
  • Author(s): S. Nakatsuji
  • Organizer: IULT2011
  • Place of Presentation: Daejeon, Korea
  • Year and Date: 2011-08-19
• [Presentation] Quantum Criticality and Superconductivity in Ba(Fe_<1.-x>Co_x)_2As_2 Investigated by Ultrasonic Measurements (2011)
  • Author(s): M. Yoshizawa, D. Kimura, T. Chiba, A. Ismayil, Y. Nakanishi, K. Kihou, M. Nakajima, C. H. Lee, A. Iyo, H. Eisaki, and S. Uchida
  • Organizer: LT26
  • Place of Presentation: Beijing, China
  • Year and Date: 2011-08-16
• [Presentation] Pressure induced physical phenomena of Ce and Yb Compounds (2011)
  • Author(s): Y. Uwatoko
  • Organizer: 26th Rare Earth Research Conference
  • Place of Presentation: Santa Fe, New Mexco, USA
  • Year and Date: 2011-06-20
• [Presentation] Quantum Critical Phases in Kondo Lattice Systems (2011)
  • Author(s): S. Nakatsuji
  • Organizer: 2011 Hangzhou Workshop on Quantum Matter - Unconventional Superconductivity and Electron Correlations
  • Place of Presentation: Hangzhou, China
  • Year and Date: 2011-04-13
• [Presentation] NMR studied of actinide dioxides (2010)
  • Author(s): Y. Tokunaga
  • Organizer: International conference, Pu futures 2010
  • Place of Presentation: Keystone, USA
  • Year and Date: 2010-09-21
• [Presentation] Quantum criticality in the valence fluctuating β-YbAlB_4 (2010)
  • Author(s): S. Nakatsuji, Y. Matsumoto, K. Kuga, T. Tomita, N. Horie
  • Organizer: SCES2010
  • Place of Presentation: Santa Fe, New Mexico, USA
  • Year and Date: 2010-06-29
• [Presentation] Low temperature magnetic properties of Pr(Cu,Ga)_<12.85> (2010)
  • Author(s): Y. Shimura, T. Sakakibara, K. Kuga, J. Y. Cho and J. Y. Chan
  • Organizer: SCES2010
  • Place of Presentation: Santa Fe, New Mexico, USA
  • Year and Date: 2010-06-29