Abstract:
:Complex oxide heterointerfaces and van der Waals heterostructures present two versatile but intrinsically different platforms for exploring emergent quantum phenomena and designing new functionalities. The rich opportunity offered by the synergy between these two classes of materials, however, is yet to be charted. Here, we report an unconventional nonlinear optical filtering effect resulting from the interfacial polar alignment between monolayer MoS2 and a neighboring ferroelectric oxide thin film. The second harmonic generation response at the heterointerface is either substantially enhanced or almost entirely quenched by an underlying ferroelectric domain wall depending on its chirality, and can be further tailored by the polar domains. Unlike the extensively studied coupling mechanisms driven by charge, spin, and lattice, the interfacial tailoring effect is solely mediated by the polar symmetry, as well explained via our density functional theory calculations, pointing to a new material strategy for the functional design of nanoscale reconfigurable optical applications.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Li D,Huang X,Xiao Z,Chen H,Zhang L,Hao Y,Song J,Shao DF,Tsymbal EY,Lu Y,Hong Xdoi
10.1038/s41467-020-15191-2subject
Has Abstractpub_date
2020-03-17 00:00:00pages
1422issue
1issn
2041-1723pii
10.1038/s41467-020-15191-2journal_volume
11pub_type
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