Visualizing moiré ferroelectricity via plasmons and nano-photocurrent in graphene/twisted-WSe2 structures
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Published:2023-10-04
Issue:1
Volume:14
Page:
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ISSN:2041-1723
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Container-title:Nature Communications
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language:en
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Short-container-title:Nat Commun
Author:
Zhang ShuaiORCID, Liu YangORCID, Sun ZhiyuanORCID, Chen XinzhongORCID, Li BaichangORCID, Moore S. L.ORCID, Liu Song, Wang Zhiying, Rossi S. E., Jing RanORCID, Fonseca JordanORCID, Yang Birui, Shao YinmingORCID, Huang Chun-Ying, Handa TaketoORCID, Xiong LinORCID, Fu Matthew, Pan Tsai-Chun, Halbertal DorriORCID, Xu Xinyi, Zheng WenjunORCID, Schuck P. J., Pasupathy A. N.ORCID, Dean C. R.ORCID, Zhu Xiaoyang, Cobden David H.ORCID, Xu XiaodongORCID, Liu MengkunORCID, Fogler M. M., Hone James C.ORCID, Basov D. N.ORCID
Abstract
AbstractFerroelectricity, a spontaneous and reversible electric polarization, is found in certain classes of van der Waals (vdW) materials. The discovery of ferroelectricity in twisted vdW layers provides new opportunities to engineer spatially dependent electric and optical properties associated with the configuration of moiré superlattice domains and the network of domain walls. Here, we employ near-field infrared nano-imaging and nano-photocurrent measurements to study ferroelectricity in minimally twisted WSe2. The ferroelectric domains are visualized through the imaging of the plasmonic response in a graphene monolayer adjacent to the moiré WSe2 bilayers. Specifically, we find that the ferroelectric polarization in moiré domains is imprinted on the plasmonic response of the graphene. Complementary nano-photocurrent measurements demonstrate that the optoelectronic properties of graphene are also modulated by the proximal ferroelectric domains. Our approach represents an alternative strategy for studying moiré ferroelectricity at native length scales and opens promising prospects for (opto)electronic devices.
Funder
DOE | SC | Basic Energy Sciences
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary
Reference55 articles.
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