Abstract
We report about possible formation of highly correlated electron pairs in the heterocyclic aromatic hydrocarbons pyridine, pyrimidine, and 1,3,5-triazine. Previously, these electron pairs have been observed in the acenes and in coronene, but not in pyrrole and furan. Our measurements presented here shed some light on the conditions for electron-pair formation and emission. Aromatic hydrocarbons are discussed as candidates for high-temperature superconductors and our findings may help to better understand the mechanisms in organic superconductors.
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