Chain-left isomer of the π-bonded chain reconstruction at theGe{111}2×1surface

Abstract
The phase in the alternation of up and down atoms along the chain shifts at type-B boundary between π-bonded chain 2×1 reconstructed domains. However, no shift was observed at some domain boundaries in empty state scanning tunneling microscope images. The no shift was attributed to the domain boundary between Pandey’s original chain-right reconstruction and its chain-left isomer.