Neutrons and x rays probe TTF–TCNQ structure

Interest in the organic conductor, TTF–TCNQ, has remained high since the report three years ago by some Penn experimenters that they had observed superconducting fluctuations in the material around 60 K. By now it is generally believed that TTF–TCNQ is not showing superconducting behavior. Nevertheless TTF–TCNQ and related substances continue to be enthusiastically studied because of their essentially one‐dimensional behavior and because of strong evidence for charge‐density waves.