Charge order and two pseudogap structures of Bi-based high-T_c superconductor studied by STM・STS

2012 Fiscal Year Final Research Report

• Project/Area Number: 22340087
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Hokkaido University
• Principal Investigator: IDO Masayuki 北海道大学, 大学院・理学研究院, 教授 (90111145)
• Co-Investigator(Kenkyū-buntansha): ODA Migaku 北海道大学, 大学院・理学研究院, 教授 (70204211) ; MOMONO Naoki 室蘭工業大学, 大学院・工学研究科, 准教授 (00261280)
• Project Period (FY): 2010 – 2012
• Keywords: 銅酸化物高温超伝導 / 走査トンネル顕微法 / 走査トンネル分光 / 擬ギャップ / 電荷秩序 / ノーダルギャップ

Research Abstract

To investigate the nature of the charge order associated with the large pseudogap, dI/dV images as well as LDOS were measured by using STM/STS technique on Bi-based high Tc cuprates. The present work leads to the following findings; 1) the charge order coexists with the quasiparticle interference patterns at low energies within the energy gap, 2) the period of the charge order tends to increase discontinuously by multiples of a lattice constant as the doping level is increased, and 3) the doping level is enhanced in the bright region of the charge order compared with the dark region. These results indicate that the charge order will originate in the redistribution of holes within the Cu-O planes, as that illustrated in the stripe model. Relationship between the small pseudogap and the superconductivity was also examined in the present work.

Research Products

• [Journal Article] Ni-impurity effects on the superconducting gap of La_2-xSr_xCuO_4 studied from the magnetic field and temperature dependence of the electronic specific heat (2012)
  • Author(s): Toru Kurosawa, N. Momono, M. Oda and M.Ido
  • Journal Title: Phys. Rev. B Volume: 85 Pages: 134522_1_7
  • DOI: doi:10.1103/PhysRevB.85.134522
  • Peer Reviewed
• [Journal Article] Spin density wave induced disordering of the vortex lattice in superconducting La_2-xSr_xCuO_4 (2012)
  • Author(s): J. Chang, J.S. White, M. Laver, C.J.Bowell, S.P. Brown, A.T. Holmes,L.Maechler, S. Streassle, R. Jilardi,S. Gerber, T. Kurosawa, N. Momono, M.Oda, M. Ido, O.J. Lipscombe, S.M Haydenet. et al.
  • Journal Title: Phys.Rev. B. Volume: 85 Pages: 134520_1_7
  • DOI: doi:10.1103/PhysRevB.85.134520
  • Peer Reviewed
• [Journal Article] Quasiparticle relaxation dynamics in underdoped B1_2Sr_2CaCu_2O_8+delta by two-color pump-probe spectroscopy (2011)
  • Author(s): Y. Toda, P. Kusar, T. Kurosawa, M. Oda, M.Ido and D. Mihailovic
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 174516-1-9
  • DOI: doi:10.1103/PhysRevB.84.174516
  • Peer Reviewed
• [Journal Article] Nonequilibrium Carrier Dynamics Studied in Underdoped Bi2212 by Polarized Optical Pump-Probe Spectroscopy (2010)
  • Author(s): Yasunori Toda, J. Sekiya, Y.H. Liu, N.Momono, M. Oda and M. Ido
  • Journal Title: Journal of Superconductivity and Novel Magnetism Volume: 23 Pages: 871-872
  • DOI: doi:10.1007/s10948-009-0608-0
  • Peer Reviewed
• [Journal Article] Impurity Effects on Energy Gap in Bi_2Sr_2CaCu2O_8+y Investigated by Electronic Raman Scattering (2010)
  • Author(s): N. Momono, T. Kurosawa, Y. Amakai, Y.Sato, T. Suzuki, H. Takano, S. Murayama, A. Sakai, M. Oda and M. Ido
  • Journal Title: Journal of Superconductivity and Novel Magnetism Volume: 23 Pages: 785-787
  • DOI: doi:10.1007/s10948-010-0694-z
  • Peer Reviewed
• [Journal Article] Ni-impurity effects on the superconducting gap of La_2-xSr_xCuO_4: Measurements of the electronic specific heat under magnetic fields (2010)
  • Author(s): T. Kurosawa, N. Momono, H. Amitsuka, M.Oda and M. Ido
  • Journal Title: Physica C-superconductivity and Its Applications Volume: 470 Pages: S42-43
  • DOI: doi:10.1016/j.physc.2009.10.107
  • Peer Reviewed
• [Journal Article] The Fermi surface and band folding in La_2-xSr_xCuO_4, probed by angle-resolved photoemission (2010)
  • Author(s): E. Razzoli, Y. Sassa, G. Drachuk, M.Mansson, A. Keren, M. Shay, M.H.Berntsen, O. Tiernberg, M. Radovic, J. Chang, S. Pailhes, N. Momono, M. Oda, M. Ido, O.J. Lipscombe, et al.
  • Journal Title: NEW JOURNAL OF PHYSICS Volume: 12 Pages: 125003
  • DOI: doi:1088/1367-2630/12/12/125003
  • Peer Reviewed
• [Presentation] 高温超伝導フォーラム (2013)
  • Author(s): 伊土政幸
  • Organizer: スペクトロスコピー「STM/STS」
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-25
• [Presentation] STM/STSから見たBi系超伝導体の電荷秩序とストライプ (2012)
  • Author(s): 山路潤、八田暁、宮崎弘、黒澤徹、桃野直樹、小田研、伊土政幸
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-21
• [Presentation] 磁場中比熱から見たBi_2Sr_2-xLn_xCuO_6+δ(Ln=La,Eu)のエネルギーギャップ (2012)
  • Author(s): 中井貴大、阿部哲、北村友、田島健士、桃野直樹、雨海有佑、村山茂幸、高野英明
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-20
• [Presentation] Nodal superconducting gap of Bi_2Sr_2-xLn_xCuO_6+δ(Ln=La,Eu) investigated by electronic specific heat measurements (2012)
  • Author(s): N. Momono
  • Organizer: The 9th International Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials
  • Place of Presentation: Grand Hotel Villa Tuscolana,Frascati-Rome, Italy (invited)
  • Year and Date: 2012-09-19
• [Presentation] STM/STSから見たBi系高温超伝導体における電荷秩序と実効的超伝導ギャップ (2011)
  • Author(s): 宮崎弘、山路潤、山上佳丈、黒澤徹、桃野直樹、小田研、伊土政幸
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-24
• [Presentation] STM/STSから見たBi-La2201の電荷秩序と擬ギャップ構造のホール濃度依存性 (2011)
  • Author(s): 八田暁、竹内卓総、山路潤、黒澤徹、桃野直樹、小田研、伊土政幸
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-22
• [Presentation] 電子比熱から見たBi2201の電子状態 (2011)
  • Author(s): 西海信孝、桃野直樹、中井貴大、栗林慧、雨海有佑、村山茂幸、高野英明
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-22
• [Presentation] Stripe order and superconductivity in the mechanical milling La_1.6-xNd_0.4Sr_xCuO_4 (2011)
  • Author(s): N. Momono
  • Organizer: The 26th International Conference on Low Temperature Physics
  • Place of Presentation: Beijing International Convention Center, Beijing, China
  • Year and Date: 2011-08-12
• [Presentation] STM/STSから見たBi-La2201の2次元電荷秩序とフェルミ面でのギャップ構造 (2010)
  • Author(s): 竹内卓総、八田暁、山上佳丈、黒澤徹、桃野直樹、小田研、伊土政幸
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] STM/STSから見た2212のCuO面における電荷秩序と実効的超伝導ギャップ (2010)
  • Author(s): 山上佳丈、宮崎弘、黒澤徹、桃野直樹、小田研、伊土政幸
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] STM・STSから見たアンダードープBi2212の超伝導ギャップ、擬ギャップ (2010)
  • Author(s): 北島裕介、黒澤徹、横内崇之、桃野直樹、小田研、伊土政幸
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] 銅酸化物高温超伝導体Bi_2Sr_2CaCu_2O_8+δの超伝導に対するZn添加効果 (2010)
  • Author(s): 鈴木隆広,桃野直樹,鳥居粛,高野英明,村山茂幸,酒井彰
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] Effects of Mechanical Milling on stripe-ordered La_2-x-yNd_yS_rxCuO_4 (2010)
  • Author(s): N. Momono
  • Organizer: The 9th International Conference on Spectroscopies in Novel Superconductors
  • Place of Presentation: Fudan University, Shanghai, China
  • Year and Date: 2010-05-28