Single crystal growth of Bi2212 with different Bi/Sr ratio for terahertz waves emitters

POSTER

Abstract

The Bi-based copper oxide high-temperature superconductor Bi2Sr2CaCu2O8+δ (Bi2212) has a nonstoichiometry composition expressed as Bi2+xSr2-xCaCu2O8+δ. We consider that the disorder of the insulating layer due to this nonstoichiometric composition (Bi/Sr) affects the CuO2 layer and consequently changes in the superconducting transition temperature and the in-plane residual resistance. The intrinsic Josephson junctions (IJJs) constructed in Bi2212 have been thought to be affected by a crystallographic disorder. For the application of Bi2212 single crystals to terahertz wave emitters (Bi2212-THz emitters) based on IJJs, we evaluated the disorder mainly from the viewpoint of crystal structure. Specifically, we prepared single crystals of Bi2212 with different Bi/Sr ratio and subsequently the oxygen was controlled by post annealing. And the physical properties of the crystals have been examined by using X-ray techniques. We also study the device characteristics of Bi2212-THz emitters made by different ratio of (Bi/Sr) and the obtained results are compared at this moment. We will discuss these characteristics in details in the meeting.

Presenters

  • Mayu Nakayama

    • Univ of Tsukuba
    • University of Tsukuba

Authors

  • Mayu Nakayama

    • Univ of Tsukuba
    • University of Tsukuba

  • Takanari Kashiwagi

    • Division of Materials Science, University of Tsukuba
    • Univ of Tsukuba
    • University of Tsukuba

  • Takayuki Imai

    • Univ of Tsukuba
    • University of Tsukuba

  • Syungo Nakagawa

    • Univ of Tsukuba
    • University of Tsukuba

  • Genki Kuwano

    • University of Tsukuba

  • Yukino Ono

    • University of Tsukuba

  • Tomoyuki Shizu

    • Univ of Tsukuba
    • University of Tsukuba

  • Youta Kaneko

    • University of Tsukuba

  • Shinji Kusunose

    • University of Tsukuba

  • Jeonghyuk Kim

    • Division of Materials Science, University of Tsukuba
    • Univ of Tsukuba
    • University of Tsukuba

  • Manabu Tsujimoto

    • Univ of Tsukuba
    • University of Tsukuba

  • Takashi Yamamoto

    • QuTech Delft University of Technology

  • Hidetoshi Minami

    • University of Tsukuba

  • Takashi Mochiku

    • National Institute for Materials Science

  • Hironori Nakao

    • Institute of Materials Structure Science, High Energy Accelerator Research Organization
    • Institute of Materials Structure Science, High Energy Accelerator Research Organization, KEK
    • KEK

  • Hiroshi Eisaki

    • AIST, Japan
    • National Institute of Advanced Industrial Science and Technology
    • The National Institute of Advanced Industrial Science and Technology
    • National Institute of Advanced Industrial Science and Technology, Japan

  • Shigeyuki Ishida

    • National Institute of Advanced Industrial Science and Technology
    • The National Institute of Advanced Industrial Science and Technology

  • Yukio Hasegawa

    • The university of Tokyo
    • The University of Tokyo
    • Institute for Solid State Physics, The University of Tokyo
    • Univ of Tokyo-Kashiwanoha

  • Richard Klemm

    • Univ of Central Florida
    • University of Central Florida
    • Physics, Univ of Central Florida

  • Kazuo Kadowaki

    • Univ of Tsukuba
    • University of Tsukuba