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Anomalous photovoltaic effect in van der Waals heterointerface

ORAL

Abstract

Van der Waals interfaces are unique platforms for novel properties and functionalities. In addition to being building blocks for functionalized devices such as p-n junctions or tunneling junctions, symmetry of the van der Waal interface has recently been attracting much attention, represented by Moiré physics in twisted interfaces [1-3] and pseudo landau level formation in graphene/black phosphorus heterostructures [4].
In this talk, I will focus on the effect of symmetry on the photovoltaic effect in van der Waals interface. The anomalous photovoltaic effect, which indicates the emergence of photo-induced spontaneous current without semiconductor p-n junction nor bias voltage, is observed at the symmetry engineered interface. A potential microscopic mechanism of the anomalous photovoltaic effect will be also discussed.

[1] M. Yankowitz, et al., Nat. Phys. 8 382 (2012).
[2] C. R. Dean, et al., Nature 497 598 (2013).
[3] Y. Cao, et al., Nature 556 43 (2018).
[4] Y. Liu, et al., Nat. Nanotech., 13 (2013) 828.

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Presenters

  • Toshiya Ideue

    Univ of Tokyo, The Univ. of Tokyo, Tokyo, Japan., The University of Tokyo

Authors

  • Toshiya Ideue

    Univ of Tokyo, The Univ. of Tokyo, Tokyo, Japan., The University of Tokyo

  • Takatoshi Akamatsu

    The University of Tokyo

  • Ling Zhou

    Nanjing University

  • Sota Kitamura

    The University of Tokyo

  • Masaru Onga

    Univ of Tokyo, The University of Tokyo

  • Yuji Nakagawa

    The University of Tokyo

  • Joseph Laurienzo

    Case Western Reserve University

  • Junwei Huang

    Nanjing University

  • Takahiro Morimoto

    Applied Physics, The University of Tokyo, Applied Physics, University of Tokyo, University of Tokyo, Univ of Tokyo, Applied physics department, University of Tokyo, The University of Tokyo

  • Hongtao Yuan

    Nanjing University

  • Yoshihiro Iwasa

    Department of Applied Physics, The University of Tokyo, Univ of Tokyo, Department of Applied Physics and Quantum-Phase Electronics (QPEC) Center, The University of Tokyo, The Univ. of Tokyo, Tokyo, Japan., The University of Tokyo, Applied Physics, the University of Tokyo