Institute of Multidisciplinary Research for Advanced Materials, Tohoku University


LAST UPDATE 2021/05/02

  • 研究者氏名
    Researcher Name

    組頭広志 Hiroshi KUMIGASHIRA
    教授 Professor
  • 所属
    Professional Affiliation

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    無機材料研究部門 ナノ機能物性化学研究分野
    Division of Inorganic Material Research, Nano Physical Chemistry
  • 研究キーワード
    Research Keywords

    Functional nanomaterials
    Oxide electronics
    Surface and interface physical properties
    Photoemission spectroscopy based on synchrotron radiation
Research Subject
Design of novel functionalities in oxide nanostructures based on synchrotron analysis

研究の背景 Background


Some oxides exhibit remarkable functional properties such as high-temperature superconductivity and photocatalysis.  It is expected that the further multifunctionality and novel physical property are created by making them nanostructured and heterostructured.  In order to control these functionalities, it is indispensable to design the nanomaterial based on the observation of electronic, magnetic, and orbital structures appearing in the nanometer scale region.

研究の目標 Outcome


Our goal is to control and design the novel functionalities appearing in the nanostructure of transition metal oxides by the best possible combination of the sophisticated oxide growth techniques using molecular beam epitaxy and advanced analysis techniques using synchrotron radiation.

研究図Research Figure

Fig.1. Schematic illustration of an “in-situ photoemission spectroscopy – Laser MBE system” which is installed as an end station of beamline in synchrotron facility. Fig.2. (a) Schematic illustration of oxide quantum well structures and (b) visualization of the novel quantization states appearing in the oxide nanostructures. Fig.3. (a) Depth profiling of chemical states by using photoemission spectroscopy and (b) analysis results for redox reaction at the metal/oxide interface of resistance random access memory during operation.

文献 / Publications

<解説>酸化物量子井戸構造に誘起される新奇な2次元電子液体状態 組頭広志、表面科学38, 596-601 (2017)

Sci. Rep. 7, 16621 (2017). Phys. Rev. Lett. 108, 111603 (2016). Nat. Commun. 6, 6759 (2015). Phys. Rev. Lett. 115, 076801 (2015). Science 333, 319 (2011).