Figure 1: Sample preparation and PFM testing of the switching behaviour of the Gr/NH3/BTO/LSMO junctions. | Nature Communications

Figure 1: Sample preparation and PFM testing of the switching behaviour of the Gr/NH3/BTO/LSMO junctions.

From: Ferroelectric tunnel junctions with graphene electrodes

Figure 1

(a) Schematics of the steps for sample preparation (see text for details). (b) An optical image of the 10 × 30-μm2 graphene patch. (c) Topographic image of the edge of the graphene patch along with the segment of the bare BaTiO3 surface. (d–i) PFM amplitude (d,f,h) and phase (e,g,i) images of the Gr/NH3/BTO/LSMO junction after application of 4 V (d,e), −4 V (f,g) and 2 V (h,i) pulses, showing changes of the domain structures under graphene. Scale bar, 10 μm (b) and 0.2 μm (g).

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