Visualizing moiré ferroelectricity via plasmons and nano-photocurrent in graphene/twisted-WSe 2 structures.

Autor: Zhang S; Department of Physics, Columbia University, New York, NY, 10027, USA. sz2822@columbia.edu., Liu Y; Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA., Sun Z; Department of Physics, Harvard University, Cambridge, MA, 02138, USA.; State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, 100084, P.R. China., Chen X; Department of Physics, Columbia University, New York, NY, 10027, USA.; Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY, 11794, USA., Li B; Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA., Moore SL; Department of Physics, Columbia University, New York, NY, 10027, USA., Liu S; Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA., Wang Z; Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA., Rossi SE; Department of Physics, Columbia University, New York, NY, 10027, USA., Jing R; Department of Physics, Columbia University, New York, NY, 10027, USA., Fonseca J; Department of Physics, University of Washington, Seattle, WA, 98195, USA., Yang B; Department of Physics, Columbia University, New York, NY, 10027, USA., Shao Y; Department of Physics, Columbia University, New York, NY, 10027, USA., Huang CY; Department of Chemistry, Columbia University, New York, NY, 10027, USA., Handa T; Department of Chemistry, Columbia University, New York, NY, 10027, USA., Xiong L; Department of Physics, Columbia University, New York, NY, 10027, USA., Fu M; Department of Physics, Columbia University, New York, NY, 10027, USA., Pan TC; Department of Physics, Columbia University, New York, NY, 10027, USA., Halbertal D; Department of Physics, Columbia University, New York, NY, 10027, USA., Xu X; Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA., Zheng W; Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY, 11794, USA., Schuck PJ; Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA., Pasupathy AN; Department of Physics, Columbia University, New York, NY, 10027, USA., Dean CR; Department of Physics, Columbia University, New York, NY, 10027, USA., Zhu X; Department of Chemistry, Columbia University, New York, NY, 10027, USA., Cobden DH; Department of Physics, University of Washington, Seattle, WA, 98195, USA., Xu X; Department of Physics, University of Washington, Seattle, WA, 98195, USA., Liu M; Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY, 11794, USA., Fogler MM; Department of Physics, University of California, San Diego, La Jolla, CA, 92093, USA., Hone JC; Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA., Basov DN; Department of Physics, Columbia University, New York, NY, 10027, USA. db3056@columbia.edu.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 Oct 04; Vol. 14 (1), pp. 6200. Date of Electronic Publication: 2023 Oct 04.
DOI: 10.1038/s41467-023-41773-x
Abstrakt: 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 WSe 2 . The ferroelectric domains are visualized through the imaging of the plasmonic response in a graphene monolayer adjacent to the moiré WSe 2 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.
(© 2023. Springer Nature Limited.)
Databáze: MEDLINE
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