Fig. 2

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(a) STM image (800 × 800 nm2, U = –1 V, I = 0.7 nA) of 1ML NaCl on Ag(110) surface (b) atomically resolved STM image of the NaCl layer (3 × 3 nm2, U = –0.2 V, I = 0.7 nA), the NaCl unit cell is indicated by black square line.
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