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Bulk photovoltaic effect modulated by ferroelectric polarization back-switching

AuthorsSheng, Yunwei; Fina, Ignasi CSIC ORCID CVN ; Gospodinov, Marin; Fontcuberta, Josep CSIC ORCID
KeywordsPhotovoltaic effects
Diffusion current
Ferroelectric materials
Short circuit
Schottky barriers
Issue Date13-Jun-2022
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 120: 242901 (2022)
AbstractShort-circuit photocurrent due to bulk photovoltaic effect displays an oscillatory dependence on the polarization state of light. Here, we explore how the ferroelectric polarization direction in h-LuMnO3 crystals affects the oscillating short-circuit photocurrent. It is shown that after prepoling the crystal at saturation, at remanence, the direction and amplitude of photocurrent oscillations are no longer dictated by prepoling voltage but are largely modulated by polarization back-switching, here ruled by the imprint field. Thus, the light polarization dependence of photocurrent is also ruled by the imprint field. The impact of these effects on the determination of the Glass coefficients of the material is discussed.
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