New quantum phenomena induced by local correlations and charge-transfer degrees of freedom

• Project/Area Number: 24540378
• 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: Kyushu Institute of Technology
• Principal Investigator: WATANABE SHINJI 九州工業大学, 工学(系)研究科(研究院), 准教授 (40334346)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 量子臨界現象 / 量子相転移 / T/Bスケーリング / 準結晶 / 重い電子系 / 非フェルミ液体 / モード結合理論 / 臨界価数ゆらぎ / 重い電子系準結晶 / Yb系近似結晶 / 近似結晶 / Ybクラスター / 価数転移 / 価数クロスオーバー / Ce化合物 / Yb化合物

Outline of Final Research Achievements

It is shown to be understood theoretically in the natural and unified way from the viewpoint of the quantum critical phenomena of Yb-valence fluctuations that the mechanism of emergence of zero-tuning unconventional quantum criticality as well as its robustness under pressure in the heavy-electron quasicrystal Yb15Al34Au51 and the origin of emergence of the T/B scaling over four decades observed in the magnetization data in beta-YbAlB4.

Research Products

• [Journal Article] Wide Quantum Critical Region of Valence Fluctuations: Origin of Robust Quantum Criticality in Quasicrystal Yb15Al34Au51 under Pressure (2015)
  • Author(s): S. Watanabe, K. Miyake
  • Journal Title: Journal of Physics: Conference Series Volume: 592 Pages: 012087-012087
  • DOI: 10.1088/1742-6596/592/1/012087
  • NAID: 120006371014
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Pressure-Induced Valence Crossover and Novel Metamagnetic Behavior near the Antiferromagnetic Quantum Phase Transition of YbNi3Ga9 (2015)
  • Author(s): K. Matsubayashi, T. Hirayama, T. Yamashita, S. Ohara, N. Kawamura, M. Mizumaki, N. Ishimatsu, S. Watanabe, K. Kitagawa, Y. Uwatoko
  • Journal Title: Phys. Rev. Lett. Volume: 114 Issue: 8 Pages: 086401-086401
  • DOI: 10.1103/physrevlett.114.086401
  • Peer Reviewed / Open Access
• [Journal Article] X-ray Absorption Spectroscopy and Novel Electronic Properties in Heavy Fermion Compounds YbT2Zn20 (T:Rh and Ir) (2015)
  • Author(s): F. Honda, Y. Hirose, A. Miyake, M. Mizumaki, N. Kawamura, S. Tsutsui, T. Watanuki, S. Watanabe, T. Takeuchi, R. Settai, D. Aoki, Y. Onuki
  • Journal Title: Journal of Physics: Conference Series Volume: 592 Pages: 012021-012021
  • DOI: 10.1088/1742-6596/592/1/012021
  • Peer Reviewed / Open Access
• [Journal Article] Thermal expansion of a Au-Al-Yb intermediate valence quasicrystal (2015)
  • Author(s): T. Watanuki, S. Kashimoto, T. Ishimasa, A. Machida, S. Yamamoto, Y. Tanaka, M. Mizumaki, N. Kawamura, S. Watanabe
  • Journal Title: Solid State Communications Volume: 211 Pages: 19-22
  • DOI: 10.1016/j.ssc.2015.03.008
  • Peer Reviewed
• [Journal Article] T/B Scaling in beta-YbAlB4 (2014)
  • Author(s): S. Watanabe, K. Miyake
  • Journal Title: J. Phys. Soc. Jpn. Volume: 83 Issue: 10 Pages: 103708-103708
  • DOI: 10.7566/jpsj.83.103708
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Unconventional Quantum Criticality Due to Critical Valence Transition (2014)
  • Author(s): K. Miyake, S. Watanabe
  • Journal Title: J. Phys. Soc. Jpn. Volume: 83 Issue: 6 Pages: 061006-061006
  • DOI: 10.7566/jpsj.83.061006
  • NAID: 210000133101
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Robustness of Quantum Criticality of Valence Fluctuations (2013)
  • Author(s): S. Watanabe and K. Miyake
  • Journal Title: J. Phys. Soc. Jpn. Volume: 82 Issue: 8 Pages: 083704-083704
  • DOI: 10.7566/jpsj.82.083704
  • NAID: 40019744985
  • Peer Reviewed
• [Journal Article] New Universality Class of Quantum Criticality in Ce- and Yb-based (2012)
  • Author(s): S. Watanabe, K. Miyake
  • Journal Title: J. Phys.: Condens. Matter Volume: 24 Issue: 29 Pages: 294208-294208
  • DOI: 10.1088/0953-8984/24/29/294208
  • Peer Reviewed
• [Journal Article] Heavy fermion superconductor CeCu2Si2 under high pressure : Multiprobing the valence crossover (2012)
  • Author(s): G.Seyfarth, A.-S.Ruetschi, K.Sengupta, A.Georges, D.Jaccard, S.Watanabe, K.Miyake
  • Journal Title: Physical Review B Volume: 85 Issue: 20
  • DOI: 10.1103/physrevb.85.205105
  • Peer Reviewed
• [Journal Article] Multiprobe Signatures of the Valence Crossover in Heavy Fermion Superconductor CeCu2Si2 Under High Pressure (2012)
  • Author(s): 4. G. Seyfarth, A.-S. Ruetschi, K. Sengupta, A. Georges, D. Jaccard, S. Watanabe, and K. Miyake
  • Journal Title: J. Phys. Soc. Jpn. Supplement B Volume: 81 Issue: Suppl.B Pages: SB004-SB004
  • DOI: 10.1143/jpsjs.81sb.sb004
  • Peer Reviewed
• [Presentation] Quantum Criticality and Emergence of the T /B Scaling in Strongly Correlated Metals (2015)
  • Author(s): Ｓ． Ｗａｔａｎａｂｅ
  • Organizer: International Conference on Magnetism 2015 (ICM2015)
  • Place of Presentation: Barcelona, Spain
  • Year and Date: 2015-07-05 – 2015-07-10
  • Invited
• [Presentation] beta-YbAlB4におけるT/Bスケーリングの出現機構：価数ゆらぎの量子臨界現象の理論に基づく解析 (2015)
  • Author(s): 渡辺真仁
  • Organizer: 日本物理学会
  • Place of Presentation: 早稲田大学早稲田キャンパス
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] Quantum Criticality of Valence Fluctuations in Ce- and Yb-Based Heavy Fermions (2014)
  • Author(s): S. Watanabe
  • Organizer: International Workshop on Quantum Criticality in Correlated Materials and Model Systems
  • Place of Presentation: Natal, Brazil
  • Year and Date: 2014-07-21 – 2014-08-01
  • Invited
• [Presentation] Wide Quantum Critical Region of Valence Fluctuations - Origin of Robust Quantum Criticality in Quasicrystal Yb15Al34Au51 under Pressure - (2014)
  • Author(s): S. Watanabe
  • Organizer: International Conference on Strongly Correlated Electron Systems (SCES2014)
  • Place of Presentation: Grenoble, France
  • Year and Date: 2014-07-07 – 2014-07-14
• [Presentation] Quantum Criticality of Valence Fluctuations in Ce- and Yb-Based Heavy Fermions (2014)
  • Author(s): S. Watanabe
  • Organizer: International Workshop on Quantum Criticality in Correlated Materials and Model Systems
  • Place of Presentation: IIP, Natal, Brazil
  • Invited
• [Presentation] Wide quantum critical region of valence fluctuations - Origin of robust quantum criticality in quasicrystal Yb15Al34Au51 under pressure - (2014)
  • Author(s): S. Watanabe
  • Organizer: The International Conference on Strongly Correlated Electron Systems 2014
  • Place of Presentation: Grenoble, France
• [Presentation] 重い電子系準結晶Yb15Al34Au51の量子臨界性 (2013)
  • Author(s): 渡辺真仁、三宅和正
  • Organizer: 日本物理学会
  • Place of Presentation: 東海大学湘南キャンパス
• [Presentation] Hall Effects Caused by Critical Valence Fluctuations (2013)
  • Author(s): S. Watanabe
  • Organizer: The International Conference on Strongly Correlated Electron Systems 2013
  • Place of Presentation: 東京大学本郷キャンパス
• [Presentation] YbT2Zn20(T: Co, Rh, Ir)の電子状態と圧力効果 (2013)
  • Author(s): 本多史憲，広瀬雄介，吉内伸吾，竹内徹也，摂待力生，三宅厚志，綿貫徹，中井裕人，水牧仁一朗，河村直己，筒井智嗣，渡辺真仁，李徳新，本間佳哉，青木大，大貫惇睦
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学東広島キャンパス
• [Presentation] 中間価数物質YbNi3Ga9における圧力誘起強磁性秩序と価数クロスオーバー (2013)
  • Author(s): 松林和幸，平山貴士，山下哲郎，大原繁男，河村直己，水牧仁一朗，石松直樹，北川健太郎，上床美也，渡辺真仁
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学東広島キャンパス
• [Presentation] Unconventional Criticality in Heavy Electron Systems (2012)
  • Author(s): S. Watanabe
  • Organizer: International Conference on Heavy Fermions and Novel Quantum Phases (ICHN2012)
  • Place of Presentation: Gyeongju, South Korea
  • Invited
• [Book] 固体物理 特集号「重い電子系の物理の最近の発展」 (2012)
  • Author(s): 渡辺真仁, 三宅和正
  • Total Pages: 9
  • Publisher: アグネ技術センター
• [Remarks]
  • URL: http://www.mns.kyutech.ac.jp/~swata/index.html
• [Remarks]
  • URL: https://www.kyutech.ac.jp/professors/tobata/t5/t5-2/entry-1142.html
• [Remarks] 渡辺研究室
  • URL: http://www.mns.kyutech.ac.jp/~swata/
• [Remarks] 九州工業大学 大学院工学研究院 基礎科学研究系 量子物理学部門 渡辺研究室
  • URL: http://www.mns.kyutech.ac.jp/~swata/