T. Nishiguchi et al., BEHAVIOR OF CHARGE-DENSITY WAVES IN A ONE-DIMENSIONAL ORGANIC CONDUCTOR VISUALIZED BY SCANNING-TUNNELING-MICROSCOPY, Physical review letters, 81(15), 1998, pp. 3187-3190
Charge density waves (CDW) in a tetrathiafulvalene-tetracyanoquinodime
thane (TTF-TCNQ) single crystal have been studied with molecular resol
ution using a low temperature scanning tunneling microscope (STM). For
the first time the periodicities of the CDW along both the a and b ax
es have been observed and were found to be coincident with those of th
e 2k(F) CDW. The influence of crystal singularities on the ordering of
the CDW along the a axis was also revealed. [S0031-9007(98)07263-9].