Appearance of New Energy Gap and Periodic Local Density-of-States Modulation in Bi_2Sr_<1.6>La_<0.4>CuO_<6+δ>(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

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概要

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• The spatial variation of the local density of states in optimally doped Bi_2Sr_<1.6>La_<0.4>CuO_<6+δ> (superconducting transition temperature is 34K) is studied by scanning tunneling spectroscopy at 4.2K in zero magnetic field. Two-dimensional density-of-states modulation aligned with the Cu-O-Cu bond with a periodicity of about five lattice constants is observed. It is found that this modulation accompanies the appearance of a new energy gap of approximately 10meV, whose gap edge peak is spatially modulated in intensity. This gap coexists with the superconducting gap, the value of which ranges from 10meV to 60meV.

• 社団法人日本物理学会の論文
• 2006-08-15

著者

• SAITO Ryo

  Department of Physics, Graduate School of Science, The University of Tokyo

• KATO Takuya

  Department of Pathology, Nagoya University Graduate School of Medicine

• Kato Takuya

  Department Of Physics Tokyo University Of Science

• Kato Takuya

  Department Of Pathology Nagoya University Graduate School Of Medicine

• SAKATA Hideaki

  Department of Physics, Tokyo University of Science

• MACHIDA Tadashi

  Department of Physics, Tokyo University of Science

• KAMIJO Yusuke

  Department of Physics, Tokyo University of Science

• HARADA Keiji

  Department of Physics, Tokyo University of Science

• NOGUCHI Tetsurou

  Department of Physics, Tokyo University of Science

• Saito Ryo

  Department Of Environmental Management Studies Information Mathematics Rakuno Gakuen University

• Harada Keiji

  Department Of Physics Tokyo University Of Science

• Kamijo Yusuke

  Department Of Physics Tokyo University Of Science

• Sakata Hideaki

  Department Of Physics Faculty Of Science Tokyo Institute Of Technology

• Noguchi Tetsurou

  Department Of Physics Tokyo University Of Science

• Machida Tadashi

  Superconducting Materials Center National Institute For Materials Science

• Saito Ryo

  Department Of Bioscience And Bioinformatics Faculty Of Computer Science And Systems Engineering Kyus

• Saito Ryo

  Department Of Physics Tokyo University Of Science

• KATO Takuya

  Department of Physics, Tokyo University of Science

• Sakata Hideaki

  Department of Otolaryngology, Saitama Children's Medical Center

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