Unidirectional Electronic Structure in the Parent State of Iron-Chalcogenide Superconductor Fe1+\deltaTe

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概要

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• We use scanning tunnelling microscopy and spectroscopy to explore the electronic structure of Fe1.07Te which is the parent compound of the iron-chalcogenide superconductors. A unidirectional electronic structure with a period of a_{0} (where a_{0} is the lattice constant) along the a-axis is observed. The unidirectional pattern is visible within an energy range from approximately -200 to +130 meV. Since the direction of the unidirectional electronic structure coincides with those of the underlying antiferromagnetic and the predicted orbital orders, it is presumable that the observed unidirectional structure is closely tied to these orders and is peculiar to the parent state in iron-based superconductors.

• 2012-07-15

著者

• Kato Takuya

  Department Of Pathology Nagoya University Graduate School Of Medicine

• MACHIDA Tadashi

  Department of Physics, Tokyo University of Science

• Hirata Kazuto

  Superconducting Materials Center National Institute For Materials Science

• Ooi Shuuichi

  Superconducting Materials Center National Institute For Materials Science

• Sakata Hideaki

  Department Of Physics Faculty Of Science Tokyo Institute Of Technology

• TAKANO Yoshihiko

  Superconducting Materials Center, National Institute for Materials Science (NIMS)

• Mochiku Takashi

  Superconducting Materials Center National Institute For Materials Science

• Takeya Hiroyuki

  Superconducting Materials Center National Institute For Materials Science

• Nakamura Hiroshi

  Department Of Analytical Chemistry Faculty Of Pharmaceutical Sciences Science University Of Tokyo

• Nakamura Hiroshi

  Department of Physics, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan

• KOGURE Kazuho

  Department of Physics, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan

• Mizuguchi Yoshikazu

  Electrical and Electronic Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan

• Ooi Shuuichi

  Superconducting Properties Unit, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan

• KATO Takuya

  Department of Physics, Tokyo University of Science

• Sakata Hideaki

  Department of Physics, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan

• Takano Yoshihiko

  Superconducting Wires Unit, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan

• Machida Tadashi

  Department of Physics, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan

• Takeya Hiroyuki

  Superconducting Wires Unit, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan

• Sakata Hideaki

  Department of Otolaryngology, Saitama Children's Medical Center

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