Observation of folded Fermi surface in the pseudogap state of high-Tc superconductor

2012 Fiscal Year Final Research Report

• Project/Area Number: 22740221
• 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: YOSHIDA Teppei 東京大学, 大学院・理学系研究科, 助教 (10376600)
• Project Period (FY): 2010 – 2012
• Keywords: 高温超伝導 / 擬ギャップ / 角度分解光電子分光

Research Abstract

We have investigated the pseudogap state of high-Tc superconductors by angle-resolved photoemission spectroscopy and have obtained experimental results as below. (1) We have observed a coexistence of two distinct energy gaps corresponding to the superconducting and pseudogap. (2) The energy gap structure of the multilayer cuprate has been clarified and we have found a parameter which scales with Tc. (3) While the Tc increases by annealing in the electron-doped cuprates, a disappearance of the psedogap has been observed. This indicates a competition between the superconductivity and the pseudogap.

Research Products

• [Journal Article] Effect of electron-phonon coupling in the ARPES spectra of the tri-layer cuprate Bi2Sr2Ca2Cu3O10+〓 (2013)
  • Author(s): S. Ideta, T. Yoshida, M. Hashimoto, A. Fujimori, H. Anzai, A. Ino, M. Arita, H. Namatame, M. Taniguchi, K. Takashima, K. M. Kojima, and S. Uchida
  • Journal Title: J. Phys. Conf. Ser Volume: 428 Pages: 012039
  • Peer Reviewed
• [Journal Article] Dependence of carrier doping on the impurity potential in transition-metal-substituted FeAs-based superconductors (2013)
  • Author(s): S. Ideta, T. Yoshida, I. Nishi, A. Fujimori, Y.Kotani, K. Ono, Y. Nakashima, S. Yamaichi, T. Sasagawa, M. Nakajima, K. Kihou, Y. Tomioka, C.H. Lee, A. Iyo, H. Eisaki, T. Ito, S. Uchida, and R. Arita
  • Journal Title: Phys. Rev. Lett Volume: 110
  • Peer Reviewed
• [Journal Article] Energy scale directly related to superconductivity inhigh-Tc cuprates: Universality from the temperature-dependent angle-resolved (2012)
  • Author(s): S. Ideta, T. Yoshida, A. Fujimori, H. Anzai,T. Fujita, A. Ino, M. Arita, H. Namatame, M. Taniguchi, Z.-X. Shen, K. Takashima, K.Kojima, and S. Uchida
  • Journal Title: Phys.Rev. B Volume: 85
  • Peer Reviewed
• [Journal Article] Pseudogap,superconducting gap, and Fermi arc inhigh-Tc cuprates revealed by angle-resolved photoemission spectroscopy (2012)
  • Author(s): T. Yoshida, M. Hashimoto, I. M. Vishik,Z.-X. Shen, and A. Fujimori
  • Journal Title: J. Phys. Soc. Jpn Volume: 81
  • Peer Reviewed
• [Journal Article] Electronic reconstruction through the structural and magnetic transitions in detwinned NaFeAs (2012)
  • Author(s): M. Yi, D.H. Lu, R.G. Moore, C.-H. Lee, A.Iyo, H. Eisaki, T. Yoshida, A Fujimori, and Z.-X. Shen
  • Journal Title: New J. Phys Volume: 14
  • Peer Reviewed
• [Journal Article] Self-Energy on the Low- to High-Energy Electronic Structure of Correlated Metal SrVO3 (2012)
  • Author(s): S. Aizaki, T. Yoshida, K. Yoshimatsu, M.Takizawa, M. Minohara, S. Ideta, A. Fujimori, K. Gupta, P. Mahadevan, K. Horiba, H. Kumigashira, M. Oshima
  • Journal Title: Phys. Lev. Lett Volume: 109
  • Peer Reviewed
• [Journal Article] Coexistence of antiferromagnetism and superconductivity in the electron-doped cuprate Sm1.85Ce0.15CuO4-δ (2011)
  • Author(s): A. F. Santander-Syro, M. Ikeda, T. Yoshida,A. Fujimori, K. Ishizaka, M. Okawa, S. Shin, R.L. Greene, and N. Bontemps
  • Journal Title: Phys. Rev. Lett Volume: 106
  • Peer Reviewed
• [Journal Article] Mass renormalization in the bandwidth-controlled Mott-Hubbard systemsSrVO3 and CaVO3 studied by angle-resolved photoemission spectroscopy (2010)
  • Author(s): T. Yoshida, M. Hashimoto, T. Takizawa, A.Fujimori, M. Kubota, K. Ono, H. Eisaki
  • Journal Title: Phys. Rev B Volume: 82
  • Peer Reviewed
• [Journal Article] Chemical potential jump between the hole-doped and electron-doped sides ofambip (2010)
  • Author(s): M. Ikeda, M. Takizawa, T. Yoshida, A.Fujimori, K. Segawa, and Y. Ando
  • Journal Title: Phys. Rev. B Volume: 82
  • Peer Reviewed
• [Presentation] Anisotropic superconducting gap in the iron pnictide superconductor (2013)
  • Author(s): T. Yoshida
  • Organizer: Energy Materials Nanotechnology WestMeeting (EMN West)
  • Place of Presentation: USA
  • Year and Date: 20130107-0110
• [Presentation] Evolution of the electronic structure by annealing, A3 Foresight Program (2013)
  • Author(s): M. Horio, Absence of pseudogap in the electron-doped cuprate superconductor Pr1.3-xLa0.7CexCuO4 (x=0.10)
  • Organizer: `Joint Research on Novel Properties of Complex Oxides
  • Place of Presentation: 東京大学
  • Year and Date: 2013-03-15
• [Presentation] Anisotropic superconducting gap of the iron-based superconductor studied by angle-resolved photoemission spectroscopy (2012)
  • Author(s): T. Yoshida
  • Organizer: Phase Separation and Superstripes in High Temperature Superconductors and Related Materials (Superstripes 2012)
  • Place of Presentation: Italy
  • Year and Date: 20120711-0718
• [Presentation] Anisotropic superconducting gap in the iron pnictide superconductor BaFe2(As1-xPx)2 (2012)
  • Author(s): T. Yoshida
  • Organizer: International Conference on Heavy Electrons and Novel QuantumPhases (ICHN 2012)
  • Place of Presentation: Gyeongju, Korea
  • Year and Date: 2012-07-05
• [Presentation] An energy scale directly related to superconductivity in the high-Tc cuprate superconductors (2011)
  • Author(s): T. Yoshida
  • Organizer: Universality from the Fermi arc picture 26th International Conference on Low Temperature Physics(LT26)
  • Place of Presentation: 北京,中国
  • Year and Date: 2011-08-13
• [Presentation] Correlated electronic structure of cuprate and iron-pnictide superconductors observed by ARPES (2010)
  • Author(s): T. Yoshida
  • Organizer: Aseminar on New aspects of high-Tcsuperconductivity from Cuprates toFe-based superconductors
  • Place of Presentation: 東京大学
  • Year and Date: 2010-07-03
• [Remarks]
  • URL: http://wyvern.phys.s.u-tokyo.ac.jp/