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Symmetry-Engineering-Induced In-Plane Polarization Enhancement in Ta[sub.2]NiS[sub.5]/CrOCl van der Waals Heterostructure

Nanomaterials (Basel, Switzerland), 2023-11, Vol.13 (23) [Peer Reviewed Journal]

COPYRIGHT 2023 MDPI AG ;ISSN: 2079-4991 ;EISSN: 2079-4991 ;DOI: 10.3390/nano13233050

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  • Title:
    Symmetry-Engineering-Induced In-Plane Polarization Enhancement in Ta[sub.2]NiS[sub.5]/CrOCl van der Waals Heterostructure
  • Author: Su, Yue ; Chen, Peng ; Xu, Xiangrui ; Zhang, Yufeng ; Cai, Weiwei ; Peng, Gang ; Zhang, Xueao ; Deng, Chuyun
  • Subjects: Anisotropy
  • Is Part Of: Nanomaterials (Basel, Switzerland), 2023-11, Vol.13 (23)
  • Description: Van der Waals (vdW) interfaces can be formed via layer stacking regardless of the lattice constant or symmetry of the individual building blocks. Herein, we constructed a vdW interface of layered Ta[sub.2]NiS[sub.5] and CrOCl, which exhibited remarkably enhanced in-plane anisotropy via polarized Raman spectroscopy and electrical transport measurements. Compared with pristine Ta[sub.2]NiS[sub.5], the anisotropy ratio of the Raman intensities for the B[sub.2g], [sup.2]A[sub.g], and [sup.3]A[sub.g] modes increased in the heterostructure. More importantly, the anisotropy ratios of conductivity and mobility in the heterostructure increased by one order of magnitude. Specifically speaking, the conductivity ratio changed from ~2.1 (Ta[sub.2]NiS[sub.5]) to ~15 (Ta[sub.2]NiS[sub.5]/CrOCl), while the mobility ratio changed from ~2.7 (Ta[sub.2]NiS[sub.5]) to ~32 (Ta[sub.2]NiS[sub.5]/CrOCl). Such prominent enhancement may be attributed to the symmetry reduction caused by lattice mismatch at the heterostructure interface and the introduction of strain into the Ta[sub.2]NiS[sub.5]. Our research provides a new perspective for enhancing artificial anisotropy physics and offers feasible guidance for future functionalized electronic devices.
  • Publisher: MDPI AG
  • Language: English
  • Identifier: ISSN: 2079-4991
    EISSN: 2079-4991
    DOI: 10.3390/nano13233050
  • Source: PubMed Central
    ROAD: Directory of Open Access Scholarly Resources
    ProQuest Central
    DOAJ Directory of Open Access Journals
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