Abstract
We have used a variable temperature ultrahigh vacuum (UHV) scanning tunneling microscope to study the quasi-one-dimensional organic conductor, tetrathiafulvalene-tetracyanoquinodimethane. The experiment has been performed in air and UHV, at temperatures ranging from 10 to 300 K. High resolution images obtained both in air and UHV clearly revealed a one-dimensional structure. The molecular positions and orientations deduced from the real space images are in good agreement with the lattice parameters obtained from other experimental methods. Below 80 K, a commensurate 2kF charge density wave modulation in real space appeared, and its associated energy gap of about 100 mV was also observed at lower temperatures.
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Schedule a callMore From: Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena
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