Studies of quantum phenomena in frustrated magnets with ultra high precision micro-magnetometer

• Project/Area Number: 20740191
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: The University of Tokyo
• Principal Investigator: MATSUMOTO Yosuke The University of Tokyo, 物性研究所, 助教 (90422443)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2008: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
• Keywords: 磁性 / 磁化測定 / スピンアイス / 量子スピン液体

Research Abstract

High precision magnetization measurements have been performed for Yb-based heavy Fermion superconductor β-YbAlB_4 and its related compounds in wide range of temperature(0.3mT〓B〓7T) and magnetic field(0.02K〓T〓300K). These measurements revealed its divergent temperature dependence in magnetization and T/B scaling in the temperature derivatives i.e., dM/dT. This observation clarifies the unconventional quantum criticality and zero-field quantum critical point in β-YbAlB_4.

Research Products

• [Journal Article] Low-temperature magnetization of the quantum critical heavy fermion superconductor β-YbAlB4 (2010)
  • Author(s): 松本洋介, 久我健太郎, 柄木良友, 冨田崇弘, 中辻知
  • Journal Title: physica status solidi (b) vol.247 Pages: 720-722
  • Peer Reviewed
• [Journal Article] Pronounced non-Fermi-liquid behavior of the quantum critical heavy fermion superconductor β-YbAlB4 (2010)
  • Author(s): 中辻知, 久我健太郎, 冨田崇弘, 松本洋介
  • Journal Title: physica status solidi (b) vol.247 Pages: 485-489
  • Peer Reviewed
• [Journal Article] Low-temperature magnetization of the quantum critical heavy fermion superconductor β-YbAlB_4 (2010)
  • Author(s): 松本洋介
  • Journal Title: physica status solidi(b) 247 Pages: 720-722
  • Peer Reviewed
• [Journal Article] Pronounced non-Fermi-liquid behavior of the quantum critical heavy fermion superconductor β-YbAlB_4 (2010)
  • Author(s): 中辻知
  • Journal Title: physica status solidi(b) 247 Pages: 485-489
  • Peer Reviewed
• [Journal Article] Multiple Gap Superconductivity with Line Node in Heavily Hole-Doped Superconductor KFe2As2 Studied by 75As-NQR and Specific Heat (2009)
  • Author(s): 深澤英人, 松本洋介, 他13名
  • Journal Title: Journal of the Physical Society of Japan vol.78 Pages: 83712-83712
  • Peer Reviewed
• [Journal Article] Possible Multiple Gap Superconductivity with Line Nodes in Heavily Hole-Doped Superconductor KFe2As2 Studied by 75As Nuclear Quadrupole Resonance and Specific Heat (2009)
  • Author(s): 深澤英人
  • Journal Title: Journal of the Physical Society of Japan 78
  • Peer Reviewed
• [Journal Article] Superconducting Properties of the Non-Fermi-Liquid System β-YbAlB4 (2008)
  • Author(s): 久我健太郎, 柄木良友, 松本洋介, 町田洋, 中辻知
  • Journal Title: PHYSICAL REVIEW LETTERS vol.101
  • Peer Reviewed
• [Journal Article] Superconducting Properties of the Non-Fermi-Liquid System β-YbAIB4 (2008)
  • Author(s): 久我健太郎
  • Journal Title: PHYSICAL REVIEW LETTERS 101
  • Peer Reviewed
• [Presentation] 重い電子系α-, ss-YbAlB_4のLu希釈効果 (2010)
  • Author(s): 松本洋介
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学津島キャンパス
  • Year and Date: 2010-03-21
• [Presentation] 重い電子系ss-YbAlB_4における低温高圧下での量子臨界性 (2010)
  • Author(s): 冨田崇弘
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学津島キャンパス
  • Year and Date: 2010-03-21
• [Presentation] 価数揺動系YbAlB_4の化学置換による量子相転移現象 (2010)
  • Author(s): 久我健太郎
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学津島キャンパス
  • Year and Date: 2010-03-21
• [Presentation] Magnetic Field Induced Crossover in the Yb-based Heavy-Fermion System α-YbAlB_4 (2010)
  • Author(s): 堀江直樹
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学津島キャンパス
  • Year and Date: 2010-03-21
• [Presentation] Zero-Field Quantum Criticality in the Heavy Fermion Superconductor ss-YbAlB_4 (2010)
  • Author(s): 松本洋介
  • Organizer: INTERNATIONAL SYMPOSIUM ON PHYSICS OF NEW QUANTUM PHASES IN SUPERCLEAN MATERIALS
  • Place of Presentation: はまぎんホール「ヴィアマーレ」, 横浜
  • Year and Date: 2010-03-09
• [Presentation] 重い電子系β-YbAlB4の零磁場量子臨界点と非フェルミ液体-フェルミ液体クロスオーバー (2009)
  • Author(s): 松本洋介
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス
  • Year and Date: 2009-09-28
• [Presentation] 重い電子系ss-YbAlB_4の零磁場量子臨界点と非フェルミ液体-フェルミ液体クロスオーバー (2009)
  • Author(s): 松本洋介
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス
  • Year and Date: 2009-09-28
• [Presentation] 重い電子系ss-YbAlB_4における圧力下の超伝導と磁性とフェルミ液体性 (2009)
  • Author(s): 冨田崇弘
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス
  • Year and Date: 2009-09-28
• [Presentation] 量子臨界物質ss-YbAlB_4のab面内磁場中における非フェルミ液体性 (2009)
  • Author(s): 久我健太郎
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス
  • Year and Date: 2009-09-28
• [Presentation] 重い電子系化合物α-YbAlB_4における磁場誘起クロスオーバー (2009)
  • Author(s): 堀江直樹
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス
  • Year and Date: 2009-09-28
• [Presentation] Non-Fermi-Liquid and Superconducting Properties of Quantum Critical ss-YbAlB_4 (2009)
  • Author(s): 中辻知
  • Organizer: 9th International Conference on Materials and Mechanisms of Superconductivity
  • Place of Presentation: 京王プラザホテル, 新宿
  • Year and Date: 2009-09-12
• [Presentation] ero-Field Quantum Criticality in the Heavy Fermion β-YbAlB4: Divergence of Magnetocaloric Effect and Scaling in Thermodynamic (2009)
  • Author(s): 松本洋介
  • Organizer: 9th International Conference on Materials and Mechanisms of Superconductivity
  • Place of Presentation: 京王プラザホテル, 新宿
  • Year and Date: 2009-09-08
• [Presentation] Zero-Field Quantum Criticality in the Heavy Fermion ss-YbAlB_4 : Divergence of Magnetocaloric Effect and Scaling in Thermodynamic (2009)
  • Author(s): 松本洋介
  • Organizer: 9th International Conference on Materials and Mechanisms of Superconductivity
  • Place of Presentation: 京王プラザホテル, 新宿
  • Year and Date: 2009-09-08
• [Presentation] Non-Fermi Liquid Behavior and Superconductivity in the Heavy Fermion System ss-YbAlB_4 under Pressure (2009)
  • Author(s): 冨田崇弘
  • Organizer: 9th International Conference on Materials and Mechanisms of Superconductivity
  • Place of Presentation: 京王プラザホテル, 新宿
  • Year and Date: 2009-09-08
• [Presentation] Superconductivity in the Novel Heavy Fermion System ss-YbAlB_4 (2009)
  • Author(s): 久我健太郎
  • Organizer: 9th International Conference on Materials and Mechanisms of Superconductivity
  • Place of Presentation: 京王プラザホテル, 新宿
  • Year and Date: 2009-09-08
• [Presentation] Fermi Liquid Properties of the Heavy-Fermion System α-YbAlB_4 (2009)
  • Author(s): 堀江直樹
  • Organizer: 9th International Conference on Materials and Mechanisms of Superconductivity
  • Place of Presentation: 京王プラザホテル, 新宿
  • Year and Date: 2009-09-08
• [Presentation] Quantum Criticality in the Heavy Fermion Superconductor ss-YbAlB_4 (2009)
  • Author(s): 中辻知
  • Organizer: 新学術領域研究「重い電子系の形成と秩序化」第二回研究会
  • Place of Presentation: 広島大学東広島キャンパス
  • Year and Date: 2009-08-18
• [Presentation] Zero-Field Quantum Criticality and Scaling in Thermodynamic Properties in the Heavy Fermion Superconductor ss-YbAlB_4 (2009)
  • Author(s): 松本洋介
  • Organizer: 新学術領域研究「重い電子系の形成と秩序化」第二回研究会
  • Place of Presentation: 広島大学東広島キャンパス
  • Year and Date: 2009-08-18
• [Presentation] Diverging Magnetocaloric Effect and Scaling in Thermodynamic Properties in the Heavy Fermion System β-YbAlB4 (2009)
  • Author(s): 松本洋介
  • Organizer: International Conference on Quantum Criticality and Novel Phases "QCNP'09"
  • Place of Presentation: Dresden(Germany)
  • Year and Date: 2009-08-05
• [Presentation] Diverging Magnetocaloric Effect and Scaling in Thermodynamic Properties in the Heavy Fermion System β-YbAlB_4 (2009)
  • Author(s): 松本洋介
  • Organizer: International Conference on Quantum Criticality and Novel Phases "QCNP'09"
  • Place of Presentation: Dresden(Germany)
  • Year and Date: 2009-08-05
• [Presentation] Non-Fermi-Liquid and novel phase formation in ss-YbAlB_4 and Pr_2Ir_2O_7 (2009)
  • Author(s): 中辻知
  • Organizer: International Conference on Quantum Criticality and Novel Phases "QCNP'09"
  • Place of Presentation: Dresden(Germany)
  • Year and Date: 2009-08-03
• [Presentation] Superconducting Properties and Non-Fermi-Liquid Behavior in the Heavy Fermion System β-YbAlB4 (2008)
  • Author(s): 松本洋介
  • Organizer: 25th International Conference on Low Temperature Physics
  • Place of Presentation: Amsterdam(Netherland)
  • Year and Date: 2008-08-09
• [Presentation] Superconducting Properties and Non-Fermi-Liquid Behavior in the Heavy Fermion System β-YbAIB4 (2008)
  • Author(s): 松本洋介
  • Organizer: 25th International Conference on Low Temperature Physics
  • Place of Presentation: Amsterdam(Netherlanc)
  • Year and Date: 2008-08-09
• [Remarks] ホームページ等
  • URL: http://satoru.issp.u-tokyo.ac.jp/index.htm