Fig. 2 Ferroelectric domains resolved in WTe2 single crystals.

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Fig. 2 Ferroelectric domains resolved in WTe2 single crystals. Ferroelectric domains resolved in WTe2 single crystals. (A) Schematic of the experimental setup for imaging domains in WTe2 single crystals. (B) High-magnification optical image of the WTe2 single crystal sample. Inset shows optical image of a bulk WTe2 single crystal. (C to E) Topography (C), corresponding PFM amplitude (D), and PFM phase images (E). (F to H) High-magnification imaging of small ferroelectric domains enclosed within the rectangle shown in (E), topography (F), corresponding PFM amplitude (G), and PFM phase images (H). (I to K) Cross-sectional profiles of topography (I), PFM amplitude (J), and phase (K) across the dashed white line shown in (H) for respective images in (F) to (H). Pankaj Sharma et al. Sci Adv 2019;5:eaax5080 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).