We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Visualizing moiré ferroelectricity via plasmons and nano-photocurrent in graphene/twisted-WSe<sub>2</sub> structures.
- Authors
Zhang, Shuai; Liu, Yang; Sun, Zhiyuan; Chen, Xinzhong; Li, Baichang; Moore, S. L.; Liu, Song; Wang, Zhiying; Rossi, S. E.; Jing, Ran; Fonseca, Jordan; Yang, Birui; Shao, Yinming; Huang, Chun-Ying; Handa, Taketo; Xiong, Lin; Fu, Matthew; Pan, Tsai-Chun; Halbertal, Dorri; Xu, Xinyi
- Abstract
Ferroelectricity, 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. Recent experiments have shown the formation of ferroelectric domains in twisted van der Waals bilayers. Here, the authors report near-field infrared nano-imaging and nano-photocurrent measurements to investigate ferroelectricity in minimally twisted WSe2 by visualizing the plasmonic and photo-thermoelectric response of an adjacent graphene monolayer.
- Subjects
FERROELECTRICITY; POLARIZATION (Electricity); PHOTOCURRENTS; ELECTRIC properties; ELECTRONIC equipment; SUPERLATTICES; OPTICAL properties
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-41773-x