Direct Probing of Fermi Surface Instability with SDW-type Anti-ferromagnetic Order

2012 Fiscal Year Final Research Report

• Project/Area Number: 22540382
• 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: 公益財団法人高輝度光科学研究センター (2012); Japan Synchrotron Radiation Research Institute (2010-2011)
• Principal Investigator: SAKURAI Yoshiharu 公益財団法人高輝度光科学研究センター, 利用研究促進部門, 副主席研究員 (90205815)
• Co-Investigator(Kenkyū-buntansha): ITOU Masayoshi (公財)高輝度光科学研究センター, 利用研究促進部門, 副主幹研究員 (10344392)
• Project Period (FY): 2010 – 2012
• Keywords: 強相関電子系 / 金属物性 / 超伝導材料・素子 / 物性実験 / 放射線 / X線 / 粒子線

Research Abstract

Fermi surface instability associated with SDW-type anti-ferromagnetic order draws much attention because the anti-erromagnetic phase and superconducting phase exist closely each other. In this study we have performed joint studies of high-resolution Compton scattering experiment and reconstruction method, and have revealed experimentally the relation between anti-ferromagnetic order and correlated itinerant electron system. We measured iron-based superconductors and cuprate superconductors. In the cuprates we found that the conducting doped holes in the under-doped region are influenced by the fluctuating anti-ferromagnetic order.

Research Products

• [Journal Article] Bulk Fermi surface and momentum density in heavily doped La_<2-x>Sr_xCuO_4 using high-resolution Compton scattering and positron annihilation spectroscopies (2012)
  • Author(s): W. Al-Sawai, B. Barbiellini, Y. Sakurai, M. Itou, P. E. ijnarends, R. S, Markiewicz, S. Kaprzyk, S. Wakimoto, M Fujita, S. Basak, H. Lin, Yung Jui Wang, S. W. H. Eijt, H. Schut, K. Yamada and A. Bansil
  • Journal Title: Phys. Rev. B Volume: 85 Pages: 115109
  • Peer Reviewed
• [Journal Article] f Electron Contribution to the Change of Electronic Structure in CeRu_2Si_2 with Temperature ; A Compton Scattering Study (2011)
  • Author(s): A. Koizumi, G. Motoyama, Y. Kubo, T. Tanaka, M. Itou and Y. Sakurai
  • Journal Title: Phy. Rev. Lett. Volume: 106 Pages: 136401
  • Peer Reviewed
• [Journal Article] Imaging Doped Holes in a Cuprate Superconductor with High-Resolution Compton Scattering (2011)
  • Author(s): Y. Sakurai, M. Itou, B. Barbiellini, P. E. Mijnarends, R. S, Markiewicz, S. Kaprzyk, J.-M. Gillet, S. Wakimoto, M. Fujita, S. Basak, Y. J. Wang, W. Al-Sawai, H. Lin, A. Bansil and K. Yamada
  • Journal Title: Science Volume: 332 Pages: 698-702
  • Peer Reviewed
• [Journal Article] Comprting Ferromagnetism and Superconductivity on FeAs Layers in EuFe_2(As_<0.73>P_<0.27>)_2 (2010)
  • Author(s): Aamir Ahmed, M. Itou, Shenggo Xu, Zhu'an Xu, Guanghan Cao, Y. Sakurai, James Penner-Hahn and Aniruddha Deb
  • Journal Title: Phys. Rev. Lett. Volume: 105 Pages: 207003
  • Peer Reviewed
• [Presentation] Electron Momentum Density A Complementary View to Charge Desnity (2012)
  • Author(s): Y. Sakurai
  • Organizer: European Charge Density Meeting (ECDM-6)
  • Place of Presentation: Hotel Patria, Strbske Pleso, Slovakia.
  • Year and Date: 20120915-20
• [Presentation] Evolving Electronic Structure of High-Tc Cuprates Studied by Compton Scattering (2012)
  • Author(s): Y. Sakurai
  • Organizer: The 19^<th> International Conference on Magnetism with Strongly Correlated Electron Systems
  • Place of Presentation: BEXCO, Busan, Korea.
  • Year and Date: 20120708-13
• [Presentation] Evolving Electronic Structure of High-Tc Cuprates by Compton Scattering (2011)
  • Author(s): Y. Sakurai
  • Organizer: ICC-IMR International Workshop on Search for New Physics in Transition Metal Compounds by Spectroscopies
  • Place of Presentation: Tohoku University, Sendai, Japan.
  • Year and Date: 20110728-30
• [Presentation] Electron momentum densities of high-Tc cuprates studied by high-resolution Compton scattering (2010)
  • Author(s): Y. Sakurai
  • Organizer: Advances in X-ray Spectroscopy. Celebrating the achievements of Professor Malcolm J. Cooper
  • Place of Presentation: Warwick University, UK.
  • Year and Date: 2010-09-29