Atomically thin two-dimensional materials have recently attracted significant attention as a new materials platform. In addition to the unique physical properties, which are absent in bulk three-dimensional materials, we can freely control the structures, electronic states and symmetries of two-dimensional materials and realize the emergent functionalities by device fabrication, application of the external pressure or electric/magnetic field, electro-chemical gating method, and making van der Waals hetero/twisted interfaces or curved nanostructures. We are exploring novel transport phenomena, superconducting properties, and optical properties in these two-dimensional materials and pioneering the frontier of material science. We are aiming at controlling the various quantum degree of freedoms or elementary excitations in two-dimensional materials (charge, spin, lattice, exciton, superconducting vortex etc.), realizing exotic quantum functionalities such as quantum rectification effect (nonreciprocal transport, superconducting diode effect, and bulk photovoltaic effect) and quantum phase control (electric-field-induced superconductivity, topological phase transition, magnetic order control), and also developing new quantum measurement techniques using microwave.

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