Abstract:
:Multiferroic bismuth ferrite, BiFeO3, offers a vast landscape to study the interplay between different ferrroic orders. Another aspect which is equally exciting, and yet underutilized, is the possibility of large-scale ordering of domains. Along with symmetry-driven bulk photovoltaic effect, BiFeO3 presents opportunities to conceptualize novel light-based devices. In this work, we investigate the evolution of the bulk photovoltaic effect in BiFeO3 thin films with stripe-domain pattern as the polarization of light is modulated from linear to elliptical to circular. The open-circuit voltages under circularly polarized light exceed ± 25 V. The anomalous character of the effect arises from the contradiction with the analytical assessment involving tensorial analysis. The assessment highlights the need for a domain-specific interaction of light which is further analyzed with spatially-resolved Raman measurements. Appropriate positioning of electrodes allows observation of a switch-like photovoltaic effect, i.e., ON and OFF state, by changing the helicity of circularly polarized light.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Knoche DS,Steimecke M,Yun Y,Mühlenbein L,Bhatnagar Adoi
10.1038/s41467-020-20446-zsubject
Has Abstractpub_date
2021-01-12 00:00:00pages
282issue
1issn
2041-1723pii
10.1038/s41467-020-20446-zjournal_volume
12pub_type
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