論文

2022年4月26日

Repeatable Photoinduced Insulator-to-Metal Transition in Yttrium Oxyhydride Epitaxial Thin Films

Chemistry of Materials
  • Yuya Komatsu
  • Ryota SHIMIZU
  • Ryuhei Sato
  • Markus Wilde
  • Kazunori Nishio
  • Takayoshi Katase
  • Daiju Matsumura
  • Hiroyuki Saitoh
  • Masahiro Miyauchi
  • Jonah R. Adelman
  • Ryan M. L. McFadden
  • Derek Fujimoto
  • John O. Ticknor
  • Monika Stachura
  • Iain McKenzie
  • Gerald D. Morris
  • W. Andrew MacFarlane
  • Jun Sugiyama
  • Katsuyuki Fukutani
  • Shinji Tsuneyuki
  • Taro Hitosugi
  • 全て表示

34
8
開始ページ
3616
終了ページ
3623
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.chemmater.1c03450
出版者・発行元
American Chemical Society ({ACS})

Currently, no known material retains its photoinduced metallic conductivity over a long time while also exhibiting repeatable metal-to-insulator recovery. Here, we demonstrate such a highly repeatable photoinduced insulator-to-metal transition in yttrium oxyhydride (YOxHy) epitaxial thin films. The temperature (T) dependence of the electrical resistivity (ρ) of the films transforms from the insulating to the metallic state (dρ/dT > 0) under ultraviolet laser illumination. The YOxHyfilm recovers its original insulating state when heated (125 °C) under an Ar atmosphere and regains metallic conductivity when subsequently subjected to ultraviolet laser illumination again, showing a repeatable photoinduced insulator-to-metal transition. First-principles calculations show that the itinerant carriers originate from the variations in the charge states of the hydrogen atoms that occupy octahedral interstitial sites. This study indicates that tuning the site occupancy (octahedral/tetrahedral) of the hydrogen atoms exerts a significant effect on the photoresponse of metal hydrides.

リンク情報
DOI
https://doi.org/10.1021/acs.chemmater.1c03450
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85128703298&origin=inward 本文へのリンクあり
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85128703298&origin=inward
ID情報
  • DOI : 10.1021/acs.chemmater.1c03450
  • ISSN : 0897-4756
  • ISSN : 1520-5002
  • eISSN : 1520-5002
  • ORCIDのPut Code : 133368158
  • SCOPUS ID : 85128703298

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