Quantum Functions of Two-Dimensional Materials

2.3 Quantum materials(Topological materials/Thermoelectric devices/Functional materials)

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Yoshihiro Iwasa

Graduate School of Engineering

Professor

This research investigates two-dimensional (2D) materials and their van der Waals heterostructures, which are anticipated to exhibit quantum mechanical properties or functions that are distinct from the bulk materials. In particular, we aim to construct novel concepts that involve high energy transduction efficiency in photovoltaic and thermoelectric effects in 2D materials.

P-N junction free solar cell of WS₂ nanotubes. This function is absent in carbon nanotubes.

Schematic of a van der Waals heterostructure that can be fabricated regardless of epitaxial conditions

Research collaborators

RIKEN

Related publications

Giant thermoelectric power factor in ultrathin FeSe superconductor.
S. Shimizu, J. Shiogai, N. Takemori, S. Sakai, H. Ikeda, R. Arita, T. Nojima, A. Tsukazaki, and Y. Iwasa, Nature Communications 10, 825 (2019).
Enhanced intrinsic photovoltaic effect in tungsten disulfide nanotubes.
Y. J. Zhang, T. Ideue, M. Onga, F. Qin, R. Suzuki, A. Zak, R. Tenne, J. H. Smet and Y. Iwasa Nature, 570, 349 (2019).