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(Color online) (a) RHEED pattern of the GaN(0001) reconstructed surface taken along the direction with an electron beam energy . (b) Real space STM image of the surface. Image , tunneling current , and tip bias voltage .
(Color online) (a) Real space and (b) images of the GaN(0001) surface obtained simultaneously. Tip bias voltage and tunneling current . Image .
(Color online) Experimental (solid) and calculated (dashed) curves of the GaN(0001) surface as a function of distance from a single step. A tip bias voltage , a tunneling current , and were used in the calculation.
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