[20p-C309-1~10] Applications of new ferroelecric materials for the future electric devices

[20p-C309-9] Less-dissipative and ultrafast-responsive shift current in ferroelectric semiconductors

〇Masao Nakamura^1,2 (1.RIKEN-CEMS, 2.JST-PRESTO)

Keywords:bulk photovoltaic effect, topological current, ferroelectrics

Shift current is a photocurrent observed in materials lacking the inversion symmetry as typified by ferroelectrics. This current originates from the change of the quantum-mechanical phase of electron wave functions upon the optical transition. Shift current is quite different from conventional current induced by electric fields, in that it is less-dissipative, outputs voltage exceeding bandgap, and shows ultrafast responsivity. In this presentation, we will introduce distinctive features of shift current which we experimentally demonstrated, and also discuss the possibility for device application.