Study of highly correlated electron system by angle resolved thermoelectric power measurement, using Corbino disk-type temperature gradient

• Project/Area Number: 21654048
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Saitama University
• Principal Investigator: TANIGUCHI Hiromi 埼玉大学, 理工学研究科, 准教授 (50323374)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥3,370,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2010: ¥900,000 (Direct Cost: ¥900,000); Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,300,000)
• Keywords: 熱電能 / 角度分解測定 / 有機物 / 角度依存性 / 有機物質 / 新測定手法

Research Abstract

We aimed to develop the novel method that enable us to measure angle-resolved thermoelectric power quasi-continuously, motivated by the importance of electronic anisotropy in highly correlated electron system. At the beginning we applied this method to organic conductors. Moreover we tried to construct novel method of determining Fermi surface anisotropy, studying anomalous transport properties of metallic state near insulating phase and determining symmetry of superconductivity. Indeed we succeeded in observing angle-dependent thermoelectric power of organic materials, which reflect anisotropy of Fermi surface.

Research Products

• [Journal Article] Short piston-cylinder pressure cells based on Ni-Cr-Al cylinders and their application to fragile materials (2010)
  • Author(s): H. Taniguchi, S. Takeda, R. Satoh, H. Komatsu, K. Satoh
  • Journal Title: Rev. Sci. Instrum Volume: 81 Pages: 33903-33911
  • Peer Reviewed
• [Journal Article] 有機導体の圧力効果の過去、現在、未来 (2010)
  • Author(s): 谷口弘三
  • Journal Title: 高圧力の科学と技術 Volume: 20
  • Peer Reviewed
• [Journal Article] Short piston-cylinder pressure cells based on Ni-Cr-Al cylinders and their application to fragile materials (2010)
  • Author(s): H.Taniguchi, S.Takeda, R.Satoh, H.Komatsu, K.Satoh
  • Journal Title: Rev.Sci.Instrum 81 Pages: 33903-33911
  • Peer Reviewed
• [Journal Article] 有機導体の圧力効果の過去、現在、未来 (2010)
  • Author(s): 谷口弘三
  • Journal Title: 高圧力の科学と技術 20(印刷中)
  • Peer Reviewed
• [Journal Article] Contactless conductivity measurements on the organic conductor,κ-(ET)_4Hg_<2.89>Br_8, under pressure (2009)
  • Author(s): H. Oike, K. Miyagawa, K. Kanoda, H. Taniguchi, K. Murata
  • Journal Title: Physica B Volume: 404 Pages: 376-378
  • Peer Reviewed
• [Journal Article] Contactless conductivity measurements on the organic conductor, κ-(ET)_4Hg_<2.89>Br_8, under pressure (2009)
  • Author(s): H.Oike, K.Miyagawa, K.Kanoda, H.Taniguchi, K.Murata
  • Journal Title: Physica B 404 Pages: 376-378
  • Peer Reviewed
• [Presentation] ガス圧SQUIDを用いたk-ET2Cu[N(CN)2]ClのMott転移の研究 (2012)
  • Author(s): 小野寺悠介、谷口弘三, 他4名
  • Organizer: 日本物理学会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-24
• [Presentation] ダイマーモット絶縁体PT2Xの物性研究 (2011)
  • Author(s): 新川貴晃、谷口弘三, 他6名
  • Organizer: 日本物理学会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-22
• [Presentation] k-(MDT-TTF)2AuI2の圧力効果と引っ張り効果 (2010)
  • Author(s): 月山佳子, 谷口亜梨早, 谷口弘三, 佐藤一彦
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-24
• [Presentation] ミュオンスピン回転・緩和法によるD8-(BEDT-TTF)2Cu[N(CN)2]Brの磁性研究 (2010)
  • Author(s): 伊藤美穂, 谷口弘三, 佐藤一彦, 石井康之, 渡邊功雄
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-24
• [Presentation] κ-(MDT-TTF)_2AuI_2の圧力効果と引っ張り効果 (2010)
  • Author(s): 月山佳子、谷口亜梨早、谷口弘三、佐藤一彦
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-24
• [Presentation] 電荷移動錯体の高圧下電解合成 (2010)
  • Author(s): 岡部憲明, 佐藤一彦, 天川智之, 谷口弘三
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] Crystal Growth and μSR Study on a Layered Antiferromagnet, κ-(D8-BEDT-TTF)2Cu[N(CN)2]Br (2010)
  • Author(s): Miho Ito, H. Taniguchi, et al.
  • Organizer: ICSM2010
  • Place of Presentation: 京都国際会館
  • Year and Date: 2010-07-08
• [Presentation] Effect of Strain on κ-Type Organic Conductors Fixed on a Glass Substrate (2010)
  • Author(s): Yoshiko Tsukiyama, H. Taniguchi, et al.
  • Organizer: ICSM2010
  • Place of Presentation: 京都国際会館
  • Year and Date: 2010-07-08
• [Presentation] Hall Effect on Metallic and Charge-Ordered States in θ-ET2CsZn(SCN)4 (2010)
  • Author(s): Takayuki Suzuki, H. Taniguchi, et al.
  • Organizer: ICSM2010
  • Place of Presentation: 京都国際会館
  • Year and Date: 2010-07-08
• [Presentation] Physical Properties of Organic Mott Insulators, (BPDT-TTF)2X (X=ICl2, IBr2 and I3) (2010)
  • Author(s): Takaaki Shinkawa, H. Taniguchi, et al.
  • Organizer: ICSM2010
  • Place of Presentation: 京都国際会館
  • Year and Date: 2010-07-08
• [Presentation] Effect on strain on κ-type organic conductors fixed on a glass substrate (2010)
  • Author(s): Y.Tsukiyama, A.Taniguchi, H.Taniguchi, K.Satoh
  • Organizer: ICSM2010(合成金属の国際会議)
  • Place of Presentation: 京都国際会議場
  • Year and Date: 2010-07-08
• [Presentation] The Measurement on Angle-Resolved Thermoelectric Power in a Layered Organic Conductor (2010)
  • Author(s): Toshinori Yanai, H. Taniguchi, et al.
  • Organizer: ICSM2010
  • Place of Presentation: 京都国際会館
  • Year and Date: 2010-07-06
• [Presentation] Studies on Superconductivity of κ-(BEDT-TTF)4Hg3-δX8 (X=Br, Cl) by AC Susceptibility Measurements (2010)
  • Author(s): Hideyuki Sato, H. Taniguchi, et al.
  • Organizer: ICSM2010
  • Place of Presentation: 京都国際会館
  • Year and Date: 2010-07-06
• [Presentation] Crystal Growth of Charge-Transfer Complexes under High Pressure (2010)
  • Author(s): Hiromi Taniguchi, N. Okabe, et al.
  • Organizer: ICSM2010
  • Place of Presentation: 京都国際会館
  • Year and Date: 2010-07-06
• [Presentation] κ-(BEDT-TTF)_2Cu(NCS)_2の角度分解熱電能測定 (2009)
  • Author(s): 箭内敏典, 谷口弘三, 佐藤一彦
  • Organizer: 日本物理学会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-26
• [Presentation] 有機導体(BEDT-TTF)(TCNQ)の圧力下結晶合成 (2009)
  • Author(s): 天川智之, 谷口弘三, 佐藤一彦
  • Organizer: 日本物理学会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-26
• [Presentation] The measurement of angle-resolved thermoelectricpower in a layered organic conductor, κ-(BEDT-TTF)2Cu2(CN)3 (2009)
  • Author(s): T. Yanai, H. Taniguchi, K. Satoh
  • Organizer: 8^<th> ISCOM
  • Place of Presentation: 北海道ニセコヒルトンホテル
  • Year and Date: 2009-09-16
• [Presentation] Hall effect on metallic and charge-ordered states in Θ-(BEDT-TTF)2CsZn(SCN)4 (2009)
  • Author(s): T. Suzuki, H. Taniguchi, K. Satoh
  • Organizer: 8^<th> ISCOM
  • Place of Presentation: 北海道ニセコヒルトンホテル
  • Year and Date: 2009-09-16
• [Presentation] Antiferromagnetic fluctuation in organic superconductor, κ-(BEDT-TTF)2Cu(NCS)2, under pressure (2009)
  • Author(s): M. Itaya, Y. Eto, A. Kawamoto, H. Taniguchi
  • Organizer: 8^<th> ISCOM
  • Place of Presentation: 北海道ニセコヒルトンホテル
  • Year and Date: 2009-09-16
• [Presentation] Comparison in physical properties between κ-(MDT-TTF)2AuI2 and κ-(BEDT-TTF)2X (2009)
  • Author(s): A. Taniguchi, Y. Manabe, H. Taniguchi, K. Satoh
  • Organizer: 8^<th> ISCOM
  • Place of Presentation: 北海道ニセコヒルトンホテル
  • Year and Date: 2009-09-16
• [Presentation] Diamagnetic transition of κ-(BEDT-TTF)4Hg2.78Cl8 proved by ac susceptibility measurements under pressure (2009)
  • Author(s): H. Sato, J. Watanabe, H. Taniguchi, K. Satoh
  • Organizer: 8^<th> ISCOM
  • Place of Presentation: 北海道ニセコヒルトンホテル
  • Year and Date: 2009-09-16
• [Presentation] High perssure synthesis of organic charge-transfer complex (BEDT-TTF)(TCNQ) (2009)
  • Author(s): T. Tenkawa, H. Taniguchi, K. Satoh
  • Organizer: 8^<th> ISCOM
  • Place of Presentation: 北海道ニセコヒルトンホテル
  • Year and Date: 2009-09-14
• [Presentation] μSR study of an antiferromagnetic insulator β'-(BEDT-TTF)2IBrCl (2009)
  • Author(s): M. Tsunoda, K. Satoh, H. Taniguchi, W. Higemoto, T. Ito
  • Organizer: 8^<th> ISCOM
  • Place of Presentation: 北海道ニセコヒルトンホテル
  • Year and Date: 2009-09-14
• [Presentation] Magnetism and ground state of an organic Mott insulator, (BPDT-TTF)2ICl2 (2009)
  • Author(s): Y. Manabe, A. Taniguchi, H. Taniguchi, K. Satoh, Y. Ishii
  • Organizer: 8^<th> ISCOM
  • Place of Presentation: 北海道ニセコヒルトンホテル
  • Year and Date: 2009-09-14
• [Remarks] 本研究に直結した成果を、ICSM2010という国際会議で発表した大学院生が、ポスター賞を受した。(ただし、ポスター賞受賞候補者は、ポスター発表だけでなく5分程度のオーラル発表も行っている)。ちなみに、この国際会議は、ポスター発表件数が1000件以上に及ぶ大規模な国際会議である。