Unconventional physical properties of 4f-electron-nuclear hyperfine-coupled multiplets

2013 Fiscal Year Final Research Report

• Project/Area Number: 23540421
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: AOKI Yuji 首都大学東京, 理工学研究科, 教授 (20231772)
• Project Period (FY): 2011 – 2013
• Keywords: 超微細結合多重項 / 超微細相互作用 / 核比熱 / 核スピン / 多極子 / スクッテルダイト / かご状物質

Research Abstract

In PrRu4P12, we have found the formation of "4f-electron-nuclear hyperfine-coupled multiplets" (formed by the hyperfine interaction between the 4f electron magnetic moment and the nuclear spin in each of Pr ions). The multiplets form a lattice in the crystal without showing any magnetic orderings at least down to 20mK. In this research work, we have investigated low-temperature transport properties and have found anomalies, which indicate that the multiplets are strongly coupled with extremely-low-density conduction electrons to form an unconventional type of strongly correlated electron states. After an intensive search in rare-earth-based intermetallic compounds, we have found some candidate materials appropriate for the investigation of the physics of "4f-electron-nuclear hyperfine-coupled multiplets".

Research Products

• [Journal Article] Electronic State of CeFe4As12 Investigated by Using Single Crystals Grown under High Pressure of 4 Gpa (2014)
  • Author(s): Y. Ogawa, H. Sato, M. Watanabe, T. Namiki, S. Tatsuoka, R. Higashinaka, Y. Aoki, K. Kuwahara, J. Yamaura, and Z. Hiroi
  • Journal Title: J. Phys. Soc. Jpn Volume: 83 Pages: 034710 (7)
  • DOI: 10.7566/JPSJ.83.034710
• [Journal Article] The effect of Au and Ni doping on the heavy fermion state of the Kondo lattice antiferromagnet CePtZn (2014)
  • Author(s): S. K. Dhar, Y. Aoki, B. Suemitsu, R. Miyazaki, A. Provino, and P. Manfrinetti
  • Journal Title: J. Appl. Phys Volume: 115 Pages: 17E113 (3)
  • DOI: 10.1063/1.4862378
• [Journal Article] Anomalously field-insensitive correlated electron behaviors in SmTa2Al20 (2013)
  • Author(s): A. Yamada, R. Higashinaka, R. Miyazaki, K. Fushiya, T.D. Matsuda, Y. Aoki, W. Fujita, H. Harima, H. Sato
  • Journal Title: J. Phys. Soc. Jpn Volume: 82 Pages: 123710 (5)
  • DOI: 10.7566/JPSJ.82.123710
• [Journal Article] Anomalous Low-Lying Thermal Excitations Deep Inside the Ferromagnetic State in Filled Skutterudite NdFe4As12 (2013)
  • Author(s): R. Higashinaka, K. Takeda, T. Namiki, Y. Aoki, H. Sato
  • Journal Title: J. Phys. Soc. Jpn Volume: 82 Pages: 114710 (6)
  • DOI: 10.7566/JPSJ.82.114710
• [Journal Article] Ru substitution effect on the peak effect in superconducting PrOs4Sb12 (2012)
  • Author(s): R. Miyazaki, R. Higashinaka, Y. Aoki, H. Sugawara and H. Sato
  • Journal Title: J. Phys. : Conf. Ser Volume: 391 Pages: 012046 (5)
  • DOI: 10.1088/1742-6596/391/1/012046
• [Journal Article] Neutron scattering study on magnetic ordering in a partially rare-earth filled skutterudite PrxFe4Sb12 (2012)
  • Author(s): K. Iwasa, T. Orihara, K. Saito, K. Tomiyasu, Y. Murakami, H. Sugawara, K. Kuwahara, H. Kimura, R. Kiyanagi, Y. Ishikawa, Y. Noda, Y. Aoki, H. Sato and M. Kohgi
  • Journal Title: J. Phys. : Conf. Ser Volume: 391 Pages: 012025 (4)
  • DOI: 10.1088/1742-6596/391/1/012025
• [Journal Article] Thermodynamic properties of the f-electron-nuclear hyperfine-coupled composite multiplets of Pr ions in filled-skutterudite PrRu4P12 (2012)
  • Author(s): Y. Aoki, T. Namiki, S.R. Saha, H. Sugawara and H. Sato
  • Journal Title: J. Phys. : Conf. Ser Volume: 391 Pages: 012003 (4)
  • DOI: 10.1088/1742-6596/391/1/012003
• [Journal Article] Heavy quasiparticles formed in the ferromagnetic Yb layers in the Kondo helical magnet YbNi3Al9 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(6)
  • DOI: 10.1103/PhysRevB.86.155106
• [Journal Article] Magnetic Excitation in Totally Symmetric Staggered Ordered Phase of PrFe4P12 (2012)
  • Author(s): K. Iwasa, L. Hao, M. Kohgi, K. Kuwahara, J.-M. Mignot, H. Sugawara, Y. Aoki, T.D. Matsuda, and H. Sato
  • Journal Title: J. Phys. Soc. Jpn Volume: 81 Pages: 094711 (9)
  • DOI: 10.1143/JPSJ.81.094711
• [Journal Article] Characterization of the Mysterious High Field Ordered Phase around H//[111] and Finding of a New Phase Boundary in PrFe4P12 (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 (11)
  • DOI: 10.1143/JPSJ.81.084703
• [Journal Article] Transport, Thermal, and Magnetic Properties of YbNi3X9 (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 Pages: 034705 (8)
  • DOI: 10.1143/JPSJ.81.034705
• [Journal Article] Magnetic and transport properties of YbT2Al20 (T = Ti, V and Cr) (2011)
  • Author(s): R. Higashinaka, A. Nakama, M. Ando, M. Watanabe, Y. Aoki and H. Sato
  • Journal Title: J. Phys. : Conf. Ser Volume: 273 Pages: 012033 (4)
  • DOI: 10.1088/1742-6596/273/1/012033
• [Journal Article] Unusual Field-Insensitive Phase Transition and Kondo Behavior in SmTi2Al20 (2011)
  • Author(s): R. Higashinaka, T. Maruyama, A. Nakama, R. Miyazaki, Y. Aoki and H. Sato
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 093703 (4)
  • DOI: 10.1143/JPSJ.80.093703
• [Journal Article] Single crystal growth and low temperature properties of PrNb2Al20 (2011)
  • Author(s): R. Higashinaka, A. Nakama, M. Ando, M. Watanabe, Y. Aoki and H. Sato
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SA048(3)
  • DOI: 10.1143/JPSJS.80SA.SA048
• [Journal Article] Temperature-dependent development of the magnetic-field-insensitive heavy fermion state in SmOs4Sb12 (2011)
  • Author(s): Y. Aoki, S. Sanada, D. Kikuchi, H. Sugawara, and H. Sato
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SA013(3)
  • DOI: 10.1143/JPSJS.80SA.SA013
• [Journal Article] Strong Effect of Yb Filling Fraction on the Magnetic Ground Sate of the Filled Skutterudite YbFe4Sb12 (2011)
  • Author(s): T.Saito, H. Sato, K. Tanaka, S. Tatsuoka, M. Ueda, R. Higashinaka, T. Namiki, Y. Aoki, Y. Utsumi, K. Kuwahara and T. Hosoya
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 063708 (4)
  • DOI: 10.1143/JPSJ.80.063708
• [Journal Article] Reentrant quantum criticality in Yb2Pd2Sn (2011)
  • Author(s): T. Muramatsu, T. Kanemasa, T. Kagayama, K. Shimizu, Y. Aoki, H. Sato, M. Giovannini, P. Bonville, V. Zlatic, I. Aviani, R. Khasanov, C. Rusu, A. Amato, K. Mydeen, M. Nicklas, H. Michor, and E. Bauer
  • Journal Title: Phys. Rev. B Volume: 83 Pages: 180404( R ), 4
  • DOI: 10.1103/PhysRevB.83.180404
• [Journal Article] f-Electron-Nuclear Hyperfine-Coupled Multiplets in the Unconventional Charge Order Phase of Filled Skutterudite PrRu4P12 (2011)
  • Author(s): Y. Aoki, T. Namiki, S.R. Saha, T. Tayama, T. Sakakibara, R. Shiina, H. Shiba, H. Sugawara and H. Sato
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 054704 (7)
  • DOI: 10.1143/JPSJ.80.054704
• [Presentation] 異方的カゴ状構造を持つRAu3Al7(R= Pr, Tm)の低温物性 (2014)
  • Author(s): 東中隆二, 他5名
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
  • Year and Date: 20140327-30
• [Presentation] LnGa6の単結晶育成と基礎物性測定 (2014)
  • Author(s): 今井勇輝, 他4名
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
  • Year and Date: 20140327-30
• [Presentation] Yb-Au-In系三元化合物の単結晶育成と物性 (2014)
  • Author(s): 鈴木主翼, 他5名
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
  • Year and Date: 20140327-30
• [Presentation] 層状超伝導化合物LnOBiS2 系の単結晶育成と物性 (2014)
  • Author(s): 松田達磨, 他5名
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
  • Year and Date: 20140327-30
• [Presentation] 充填スクッテルダイトPrRu4P12の電子輸送特性 : 伝導電子と強く結合したPr核スピン-4f電子複合状態 (2013)
  • Author(s): 青木勇二, 他6名
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学
  • Year and Date: 20130925-28
• [Presentation] 新奇ピーナッツ型カゴ状構造を有するTm6Cr4Al43における特異な秩序状態 (2013)
  • Author(s): 伏屋健吾, 他5名
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学
  • Year and Date: 20130925-28
• [Presentation] Strong coupling of conduction electrons with the 4f-electron-nuclear-spin composite states in filled skutterudite PrRu4P12 (2013)
  • Author(s): Y.Aoki, 他5名
  • Organizer: Strongly Correlated Electron Systems 2013 (SCES 2013)
  • Place of Presentation: University of Tokyo, Tokyo
  • Year and Date: 20130805-09
• [Presentation] Tm-based Kondo effect and possible multipole ordering in peanut-shaped cage structure compound Tm6Cr4Al43 (2013)
  • Author(s): K. Fushiya, 他5名
  • Organizer: Strongly Correlated Electron Systems 2013 (SCES 2013)
  • Place of Presentation: University of Tokyo, Tokyo
  • Year and Date: 20130805-09
• [Presentation] Single crystal growth and low-temperature physical properties of cage structure compound SmTa2Al20 (2013)
  • Author(s): A. Yamada, 他9名
  • Organizer: Strongly Correlated Electron Systems 2013 (SCES 2013)
  • Place of Presentation: University of Tokyo, Tokyo
  • Year and Date: 20130805-09
• [Presentation] The valence state and possible parameters of the eld-insensitive magnetic transition in SmTr2Al20 (2013)
  • Author(s): R. Higashinaka, 他10名
  • Organizer: Strongly Correlated Electron Systems 2013 (SCES 2013)
  • Place of Presentation: University of Tokyo, Tokyo
  • Year and Date: 20130805-09
• [Presentation] カゴ状化合物単結晶試料の低温熱電能測定 (2013)
  • Author(s): 小野修平, 他3名
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学
  • Year and Date: 20130326-29
• [Presentation] 新規カゴ状化合物Tm6Cr4Al43の単結晶育成と物性測定 (2013)
  • Author(s): 伏屋健吾, 他4名
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学
  • Year and Date: 20130326-29
• [Presentation] PrRu4P12の低温におけるミュオンスピン緩和 (2012)
  • Author(s): 髭本亘, 他5名
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 20120918-21
• [Presentation] YbAu3Al7の単結晶育成と物性測定 (2012)
  • Author(s): 國利洸貴, 他5名
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 20120918-21
• [Presentation] Unusual heavy fermion behavior inPrTr2Al20 (Tr = Nb, Ta) associated with Gamma3 quadrupolar degrees of freedom (2012)
  • Author(s): R. Higashinaka, 他4名
  • Organizer: The 19th International conference on Magnetism (ICM 2012)
  • Place of Presentation: Busan, Korea
  • Year and Date: 20120708-13
• [Presentation] PrFe4P12H//[111]に於ける高磁場秩序相及び新たな高磁場相境界の評価 (2012)
  • Author(s): 青木英和, 他9名
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 20120324-27
• [Presentation] 極低温物性測定によるカゴ状物質PrNb2Al20の基底状態の探索 (2012)
  • Author(s): 東中隆二, 他4名
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 20120324-27
• [Presentation] PrTa2Al20の磁場誘起相転移 (2012)
  • Author(s): 中間章浩, 他4名
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 20120324-27
• [Presentation] カゴ状金属間化合物RT2Al20の単結晶育成と物性測定 (2011)
  • Author(s): 中間章浩, 他6名
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 20110921-24
• [Presentation] f-Electron-Nuclear Hyperfine-Coupled Multiplets of Pr Ions in Charge-Ordered Filled Skutterudite PrRu4P12 (2011)
  • Author(s): Y. Aoki, 他8名
  • Organizer: International conference on Strongly Correlated Electron Systems 2011 (SCES2011)
  • Place of Presentation: Cambridge, England
  • Year and Date: 20110829-0903
• [Presentation] Unusual Heavy Fermion Behavior in PrNb2Al20 with a Γ3 Doublet Ground State (2011)
  • Author(s): R. Higashinaka, 他7名
  • Organizer: International conference on Strongly Correlated Electron Systems 2011 (SCES2011)
  • Place of Presentation: Cambridge, England
  • Year and Date: 20110829-0903
• [Book] 特集籠状物質「充填スクッテルダイトRT4X12(R:希土類, T : 遷移金属, X : P, As, Sb)-その結晶構造が可能にした多彩な振る舞い-」 (2012)
  • Author(s): 佐藤英行・ 青木勇二・ 菅原仁・ 播磨尚朝
  • Total Pages: 340-345
  • Publisher: Bulletin of the Ceramic Society of Japan
  • URL: http://www.ceramic.or.jp/ihensyub/
• [Book] "充填スクッテルダイトにおける多極子物性"特集号「重い電子系の物理の最近の発展」IV.多極子の物理の発展,固体物理( Solid State Physics) (2012)
  • Author(s): 青木勇二, 菅原仁, 佐藤英行
  • Total Pages: 637-649
  • URL: http://www.agne.co.jp/kotaibutsuri/kota1047.htm
• [Remarks] 「Pr化合物中に発見された4f電子と核の複合準位系」日本物理学会誌Vol.66, No.8, (2011)p623-624
• [Remarks] 科学新聞(週刊)平成23年5月20日第3340号「Pr化合物中に形成された電子と核の複合状態発見」
• [Remarks] 首都大学東京ウェブページ : ニュース掲載
  • URL: http://www.tmu.ac.jp/news/topics/3274.html?d=assets/files/download/news/press_110510.pdf