Exploration for Exotic Superconductivity and novel electronic state in Some Strongly Correlated Electron Compounds by DC Magnetic Measurements under 10 GPa Class High Pressure

• Project/Area Number: 20540355
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Shimane University
• Principal Investigator: MIYOSHI Kiyotaka Shimane University, 総合理工学部, 准教授 (10294365)
• Co-Investigator(Renkei-kenkyūsha): TAKEUCHI Jun 島根大学, 総合理工学部, 教授 (00135899)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 強相関電子系 / 鉄系超伝導 / 高圧力 / パイロクロア / 鉄系化合物 / 超伝導 / 圧力下磁化測定 / 遷移金属酸化物 / ラットリング

Research Abstract

Characteristic pressure dependences of T_c have been successfully revealed by DC magnetic measurements under high pressure up to 10 GPa for β pyrochlore oxide AOs_2O_6 (A=K, Rb, Cs), iron pnictide superconductor FeSe_x and LiFeAs using miniature diamond anvil cell combined with commercial SQUID magnetometer. It has been also found that the first order transition at T_s=155K for Li_xCoO_2 (0.46≦x≦0.71) strongly correlates with the ordering of Li ions below TF=130K, suggesting the possible charge ordering in CoO_2 layers below T_s=155K.

Research Products

• [Journal Article] Magnetic and Electronic Properties of Li_xCoO_2 Single Crystals (2010)
  • Author(s): K.Miyoshi, C.Iwai, H.Kondo, M.Miura, S.Nishigori, J.Takeuchi
  • Journal Title: Physical Review B 82
  • Peer Reviewed
• [Journal Article] Magnetic and Electronic Properties of Li_xCoO_2 Single Crystals (2010)
  • Author(s): K.Miyoshi
  • Journal Title: Physical Review B Volume: 82
  • Peer Reviewed
• [Journal Article] Electronic structure of Li_xCoO_2 studied by photoemision spectroscopy and unrestricted Hartree-Fock calculations (2010)
  • Author(s): K.Ikedo
  • Journal Title: Physical Review B Volume: 82
  • Peer Reviewed
• [Journal Article] Anomalous Pressure Dependence of the Superconducting Transition Temperature in FeSe_<1-x> Studied by DC Magnetic Measurements (2010)
  • Author(s): K.Miyoshi
  • Journal Title: J.Phys Soc.Jpn 78 Pages: 93703-93706
  • Peer Reviewed
• [Journal Article] Magnetic measurements of FeSe superconductor under high pressure (2010)
  • Author(s): K.Miyoshi
  • Journal Title: J.Phys.Conference Series 200 Pages: 12126-12129
  • Peer Reviewed
• [Journal Article] Anomalous Pressure Dependence of the Superconducting Transition Temperature in FeSe_<1-x> Studied by DC Magnetic Measurements (2009)
  • Author(s): K.Miyoshi, Y.Takaichi, E.Mutou, K.Fujiwara, J.Takeuchi
  • Journal Title: Journal of the Physical Society of Japan 78 Pages: 93703-93706
  • Peer Reviewed
• [Journal Article] Magnetic and Transport Properties of Layered Li_xCoO_2 Single Crystals (2009)
  • Author(s): K.Miyoshi, H.Kondo, M.Miura, C.Iwai, K.Fujiwara, J.Takeuchi
  • Journal Title: Journal of Physics, Conference Series 150 Pages: 42129-42132
  • Peer Reviewed
• [Journal Article] Anomalous Pressure Dependence of the Superconducting Transition Temperature in the β-pyrochlore KOs_2O_6 (2009)
  • Author(s): K.Miyoshi, Y.Takaichi, J.Takeuchi
  • Journal Title: Journal of Physics, Conference Series 150 Pages: 52165-52168
  • Peer Reviewed
• [Journal Article] Anomalous Pressure Dependence of the Superconducting Transition Temperature in the β-pyrochlore KOs_2O_6 (2009)
  • Author(s): K. Miyoshi
  • Journal Title: Journal of Physics Conference Series 150 Pages: 52165-52168
  • Peer Reviewed
• [Journal Article] Magnetic and Transport Properties of Lavered Li_xCoO_2 Single Crystals (2009)
  • Author(s): K. Miyoshi
  • Journal Title: Journal of Physics Conference Series 150 Pages: 42129-42132
  • Peer Reviewed
• [Journal Article] Superconducting Transition in the β-Pyrochlore AOs_2O_6 (A=Cs, Rb, K) under Pressure (2008)
  • Author(s): K.Miyoshi, Y.Takaichi, Y.Takamatsu, M.Miura, J.Takeuchi,
  • Journal Title: Journal of Physical Society of Japan 77 Pages: 43704-43707
  • NAID: 110006649404
  • Peer Reviewed
• [Journal Article] Superconducting Transition in the β-Pyrochlore AOs_2O_6 (A=Cs, Rb, K)under Pressure (2008)
  • Author(s): K. Miyoshi
  • Journal Title: Journal of Physical Society of Japan 77 Pages: 43704-43707
  • NAID: 110006649404
  • Peer Reviewed
• [Journal Article] Electronic structure of Li_xCoO_2 studied by photoemision spectroscopy and unrestricted Hartree-Fock caluculations
  • Author(s): K.Ikedo, Y.Wakisaka, T.Mizokawa, C.Iwai, K.Miyoshi, J.Takeuchi
  • Journal Title: Physical Review B 82
  • Peer Reviewed
• [Journal Article] Magnetic measurements of FeSe superconductor under high pressure
  • Author(s): K.Miyoshi, Y.Takaichi, E.Mutou, K.Fujiwara, J.Takeuchi
  • Journal Title: Journal of Physics, Conference Series 200 Pages: 12126-12129
  • Peer Reviewed
• [Presentation] DC Magnetization Measurements of Iron-Based layered Superconductor Li_xFeAs under High Pressure (2010)
  • Author(s): 三好清貴, 小川紗季, 藤原賢二, 竹内潤
  • Organizer: 5^<th> Asian Conference on High Pressure Research
  • Place of Presentation: 松江市くにびきメッセ
  • Year and Date: 2010-11-08
• [Presentation] DC Magnetization Measurements of FeSe_x under High Pressure (2010)
  • Author(s): 武藤絵里子, 高市裕大, 三好清貴, 藤原賢二, 竹内潤
  • Organizer: 5^<th> Asian Conference on High Pressure Research
  • Place of Presentation: 松江市くにびきメッセ
  • Year and Date: 2010-11-08
• [Presentation] DC Magnetization Measurements of Iron-Based layered Superconductor LixFeAs under Hiah Pressure (2010)
  • Author(s): K.Miyoshi
  • Organizer: 5^<th> Asian Conference on High Pressure Research
  • Place of Presentation: 松江市くにびきメッセ
  • Year and Date: 2010-11-08
• [Presentation] DC Magnetization Measurements of FeSex under High Pressure (2010)
  • Author(s): K.Miyoshi
  • Organizer: 5^<th> Asian Conference on High Pressure Research
  • Place of Presentation: 松江市くにびきメッセ
  • Year and Date: 2010-11-08
• [Presentation] Li_xCoO_2単結晶の電子状態2 (2010)
  • Author(s): 池戸一道, 須田山貴亮, 脇坂祐輝, 溝川貴司, 岩井千佳, 三好清貴, 竹内潤, N.L.Saini、有田将司、生天目博文、谷口雅樹、池戸一道、三好清貴、竹内潤
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
  • Year and Date: 2010-09-26
• [Presentation] FeSe系およびFe (Se, Te)系超伝導体の高圧下磁化測定II (2010)
  • Author(s): 武藤絵里子、三好清貴、藤原賢二、竹内潤
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
  • Year and Date: 2010-09-23
• [Presentation] FeSe系およびFe(Se,Te)系超伝導体の高圧下磁化測定II (2010)
  • Author(s): 三好清貴
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
  • Year and Date: 2010-09-23
• [Presentation] Li_xCoO_2単結晶の低温物性 (2010)
  • Author(s): 岩井千佳, 三好清貴, 藤原賢二, 竹内潤, 西郡至誠
  • Organizer: 日本物理学会 第65回年次大会
  • Place of Presentation: 岡山大学(岡山市)
  • Year and Date: 2010-03-22
• [Presentation] Li_xCoO_2単結晶の電子状態 (2010)
  • Author(s): 池戸一道, 須田山貴亮, 脇坂祐輝, 溝川貴司, 岩井千佳, 三好清貴, 竹内潤, H.Wadati, G.A.Sawatzky, D.G.Hawthorn, T.Z.Regier
  • Organizer: 日本物理学会 第65回年次大会
  • Place of Presentation: 岡山大学(岡山市)
  • Year and Date: 2010-03-22
• [Presentation] FeSe系およびFe (Se, Te)系超伝導体の高圧下磁化測定 (2010)
  • Author(s): 武藤絵里子, 三好清貴, 藤原賢二, 竹内潤
  • Organizer: 日本物理学会 第65回年次大会
  • Place of Presentation: 岡山大学(岡山市)
  • Year and Date: 2010-03-20
• [Presentation] LixFeAsの高圧下磁化測定 (2010)
  • Author(s): 小川紗季, 三好清貴, 藤原賢二, 竹内潤
  • Organizer: 日本物理学会 第65回年次大会
  • Place of Presentation: 岡山大学(岡山市)
  • Year and Date: 2010-03-20
• [Presentation] FeSe系およびFe(Se.Te)系超伝導体の高圧下磁化測定 (2010)
  • Author(s): 三好清貴
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学(岡山市)
  • Year and Date: 2010-03-20
• [Presentation] Li_xFeAs系の高圧下磁化測定 (2010)
  • Author(s): 三好清貴
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学(岡山市)
  • Year and Date: 2010-03-20
• [Presentation] Li_xCoO_2単結晶の光電子分光 (2009)
  • Author(s): 池戸一道, 脇坂祐輝, 溝川貴司, 岩井千佳, 三好清貴, 竹内潤
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学(熊本市)
  • Year and Date: 2009-09-26
• [Presentation] FeSe系超伝導体の高圧下磁化測定 (2009)
  • Author(s): 武藤絵里子, 高市裕大, 三好清貴, 藤原賢二, 竹内潤
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学(熊本市)
  • Year and Date: 2009-09-26
• [Presentation] RFeAsO_<1-x>F_x(R=La, Sm)の高圧下磁化測定 (2009)
  • Author(s): 小川紗季, 三好清貴, 藤原賢二, 竹内潤
  • Organizer: 日本物理学会 2009年秋季大会
  • Place of Presentation: 熊本大学(熊本市)
  • Year and Date: 2009-09-26
• [Presentation] Li_xCoO_2単結晶の低温物性III (2009)
  • Author(s): 岩井千佳, 三好清貴, 藤原賢二, 竹内潤, 西郡至誠
  • Organizer: 日本物理学会 2009年秋季大会
  • Place of Presentation: 熊本大学(熊本市)
  • Year and Date: 2009-09-26
• [Presentation] RFeAsO_<1-x>F_x (R=La, Sm)の高圧下磁化測定 (2009)
  • Author(s): 三好清貴
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学(熊本市)
  • Year and Date: 2009-09-26
• [Presentation] Magnetic measurements of FeSe superconductor under high pressure (2009)
  • Author(s): 三好清貴, 高市裕大, 武藤絵里子, 藤原賢二, 竹内潤
  • Organizer: International Conference on Magnetism
  • Place of Presentation: カールスルーエ(ドイツ)
  • Year and Date: 2009-07-30
• [Presentation] Magnetic measurements of FeSe superconductor under high pressure (2009)
  • Author(s): K.Miyoshi
  • Organizer: International Conference on Magnetism
  • Place of Presentation: カールスルーエ (ドイツ)
  • Year and Date: 2009-07-30
• [Presentation] Li_xCoO_2単結晶の低温物性II (2009)
  • Author(s): 岩井千佳, 三好清貴, 藤原賢二, 竹内潤
  • Organizer: 日本物理学会 第64回年次大会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-27
• [Presentation] 高圧下帯磁率測定によるβ型パイロクロア酸化物超伝導体AOs_2O_6(A=K, Rb, Cs)のTcの圧力依存性III (2008)
  • Author(s): 高市裕大, 三好清貴, 藤原賢二, 竹内潤
  • Organizer: 日本物理学会 2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-21
• [Presentation] Anomalous Pressure Dependence of the Superconducting Transition Temperature in the β-pyrochlore KOs_2O_6 (2008)
  • Author(s): 三好清貴, 高市裕大, 竹内潤
  • Organizer: 25th International conference on Low Temperature Physics
  • Place of Presentation: アムステルダム(オランダ)
  • Year and Date: 2008-08-08
• [Presentation] Magnetic and Transport Properties of Layered Li_xCoO_2 Single Crystals (2008)
  • Author(s): K.Miyoshi, H.Kondo, M.Miura, C.Iwai, K.Fujiwara, J.Takeuchi
  • Organizer: 25th International conference on Low Temperature Physics
  • Place of Presentation: アムステルダム(オランダ)
  • Year and Date: 2008-08-08
• [Presentation] Anomalous Pressure Dependence of the Superconducting Transition Temperature in the β-pyrochlore KOs_2O_6 (2008)
  • Author(s): K. Miyoshi
  • Organizer: 25^<th> International Conference on Low Temperature Physics
  • Place of Presentation: オランダ・アムステルダムRAI会議場
  • Year and Date: 2008-08-08
• [Remarks] 特になし