Ultrafast Carrier Dynamics and Light-Induced Functionalizations of Topological Insulators

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Other Title
  • トポロジカル絶縁体の超高速キャリアダイナミクスの観測と光機能化
  • トポロジカル ゼツエンタイ ノ チョウコウソク キャリアダイナミクス ノ カンソク ト ヒカリ キノウカ

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Abstract

<p>By using time- and angle-resolved photoemission spectroscopy, we investigate the ultrafast carrier dynamics in the series of (Sb, Bi)2 Te3. We show that the electronic recovery time for the surface Dirac fermions is prolonged to >400 ps when the charge neutrality point is approached. We also discuss the emergence of light-induced functionalizations such as surface photovoltage effect in the ultrafast time-domain. Our study strengthens the route toward the Dirac materials to be an opto-spintronic application.</p>

Journal

  • Butsuri

    Butsuri 75 (12), 756-760, 2020-12-05

    The Physical Society of Japan

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