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Symmetry regimes for circular photocurrents in monolayer MoSe2

Author

Listed:
  • Jorge Quereda

    (University of Groningen)

  • Talieh S. Ghiasi

    (University of Groningen)

  • Jhih-Shih You

    (IFW Dresden)

  • Jeroen Brink

    (IFW Dresden)

  • Bart J. Wees

    (University of Groningen)

  • Caspar H. Wal

    (University of Groningen)

Abstract

In monolayer transition metal dichalcogenides helicity-dependent charge and spin photocurrents can emerge, even without applying any electrical bias, due to circular photogalvanic and photon drag effects. Exploiting such circular photocurrents (CPCs) in devices, however, requires better understanding of their behavior and physical origin. Here, we present symmetry, spectral, and electrical characteristics of CPC from excitonic interband transitions in a MoSe2 monolayer. The dependence on bias and gate voltages reveals two different CPC contributions, dominant at different voltages and with different dependence on illumination wavelength and incidence angles. We theoretically analyze symmetry requirements for effects that can yield CPC and compare these with the observed angular dependence and symmetries that occur for our device geometry. This reveals that the observed CPC effects require a reduced device symmetry, and that effects due to Berry curvature of the electronic states do not give a significant contribution.

Suggested Citation

  • Jorge Quereda & Talieh S. Ghiasi & Jhih-Shih You & Jeroen Brink & Bart J. Wees & Caspar H. Wal, 2018. "Symmetry regimes for circular photocurrents in monolayer MoSe2," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05734-z
    DOI: 10.1038/s41467-018-05734-z
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    Cited by:

    1. Zihan Liang & Xin Zhou & Le Zhang & Xiang-Long Yu & Yan Lv & Xuefen Song & Yongheng Zhou & Han Wang & Shuo Wang & Taihong Wang & Perry Ping Shum & Qian He & Yanjun Liu & Chao Zhu & Lin Wang & Xiaolong, 2023. "Strong bulk photovoltaic effect in engineered edge-embedded van der Waals structures," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Yongheng Zhou & Xin Zhou & Xiang-Long Yu & Zihan Liang & Xiaoxu Zhao & Taihong Wang & Jinshui Miao & Xiaolong Chen, 2024. "Giant intrinsic photovoltaic effect in one-dimensional van der Waals grain boundaries," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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