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RIKEN Center for Emergent Matter Science Low-Dimensional Quantum Device Research Unit

Unit Leader: Yuya Shimazaki (Ph.D.)

Research Summary

Yuya Shimazaki

Our unit focuses on the exploration of physics in novel quantum devices utilizing low-dimensional structures formed by the moiré interference effects of crystal lattices and semiconductor microfabrication, primarily based on two-dimensional materials. In particular, we aim to elucidate the quantum many-body physics and quantum device physics in semiconductor moiré superlattices through electrical control and probing and control through optical excitation. Starting from bulk single crystals of layered compounds, our research comprehensively covers the fabrication of heterostructures of two-dimensional materials, device fabrication, electrical control, optical measurements, and electrical transport measurements at extremely low temperatures, as well as the development of necessary equipment and software.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Engineering
  • Interdisciplinary Science & Engineering
  • Nanostructural physics-related
  • Semiconductors, optical properties of condensed matter and atomic physics-related
  • Magnetism, superconductivity and strongly correlated systems-related


  • Two-dimensional materials
  • Van der Waals heterostructure
  • Semiconductor device physics
  • Quantum device
  • Optical spectroscopy

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

  • 1. Popert, A., Shimazaki, Y., Kroner, M., Watanabe, K., Taniguchi, T., Imamoğlu, A., Smoleński, T.:
    "Optical Sensing of Fractional Quantum Hall Effect in Graphene"
    Nano Letters, 22, 7363 (2022).
  • 2. Schwartz, I., Shimazaki, Y., Kuhlenkamp, C., Watanabe, K., Taniguchi, T., Kroner, M., Imamoğlu, A.:
    "Electrically tunable Feshbach resonances in twisted bilayer semiconductors"
    Science, 374, 336 (2021).
  • 3. *Smoleński, T., Dolgirev, P. E., Kuhlenkamp, C., Popert, A., Shimazaki, Y., Back, P., Lu, X., Kroner, M., Watanabe, K., Taniguchi, T., Esterlis, I., Demler, E., Imamoğlu, A.:
    "Signatures of Wigner crystal of electrons in a monolayer semiconductor"
    Nature, 595, 53 (2021).
  • 4. *Shimazaki, Y., Kuhlenkamp, C., Schwartz, I., Smoleński, T., Watanabe, K., Taniguchi, T., Kroner, M., Schmidt, R., Knap, M., Imamoğlu, A.:
    "Optical Signatures of Periodic Charge Distribution in a Mott-like Correlated Insulator State"
    Physical Review X, 11, 021027 (2021).
  • 5. Tanaka, M., Shimazaki, Y., Borzenets, I. V., Watanabe, K., Taniguchi, T., Tarucha, S., Yamamoto, M.:
    "Charge Neutral Current Generation in a Spontaneous Quantum Hall Antiferromagnet"
    Physical Review Letters, 126, 016801 (2021).
  • 6. *Shimazaki, Y., Schwartz, I., Watanabe, K., Taniguchi, T., Kroner, M., Imamoglu, A.:
    "Strongly correlated electrons and hybrid excitons in a moiré heterostructure"
    Nature, 580, 472 (2020).
  • 7. *Smolenski, T., Cotlet, O., Popert, A., Back, P., Shimazaki, Y., Knüppel, P., Dietler, N., Taniguchi, T., Watanabe, K., Kroner, M., Imamoglu, A.:
    "Interaction-Induced Shubnikov–de Haas Oscillations in Optical Conductivity of Monolayer MoSe¬2"
    Physical Review Letters, 123, 097403 (2019).
  • 8. *Borzenets, I. V., Shimazaki, Y., Jones, G. F., Craciun, M. F., Russo, S., Yamamoto, M., Tarucha, S.:
    "High Efficiency CVD Graphene-lead (Pb) Cooper Pair Splitter"
    Scientific Reports, 6, 23051 (2016).
  • 9. *Yamamoto, M., Shimazaki, Y., Borzenets, I. V., Tarucha, S.:
    "Valley Hall Effect in Two-Dimensional Hexagonal Lattices"
    Journal of the Physical Society of Japan, 84, 121006 (2015).
  • 10. *Shimazaki, Y., Yamamoto, M., Borzenets, I. V., Watanabe, K., Taniguchi, T., Tarucha, S.:
    "Generation and detection of pure valley current by electrically induced Berry curvature in bilayer graphene"
    Nature Physics, 11, 1032 (2015).

Related Links

Lab Members

Principal investigator

Yuya Shimazaki
Unit Leader

Contact Information

S302, Chemistry and Materials Physics Building,
2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Email: yuya.shimazaki [at] riken.jp