作者: Ming-Min Yang , Marin Alexe
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摘要: Manipulation of ferroic order parameters, namely (anti-)ferromagnetic, ferroelectric, and ferroelastic, by light at room temperature is a fascinating topic in modern solid-state physics due to potential cross-fertilization research fields that are largely decoupled. Here, full optical control, is, reversible switching, the ferroelectric/ferroelastic domains BiFeO3 thin films mediation tip-enhanced photovoltaic effect demonstrated. The enhanced short-circuit photocurrent density tip contact area generates local electric field well exceeding coercive field, enabling ferroelectric polarization switching. Interestingly, tailoring direction, via either tuning illumination geometry or simply rotating polarization, control achieved. finding offers new insight into interactions between orders, fully all orders providing guidance design novel optoferroic devices for data storage sensing.