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Abstract
On the basis of highly reproducible scanning tunneling microscopy (STM) images of the tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ) surface with atomic resolution, a new interpretation for such STM images from the viewpoint of the relative phase difference of the molecular orbital in each organic molecule is presented. The interpretation is based on the interference effect on tunneling because of the short tip-sample distance.