Approaching an organic semimetal: Electron pockets at the Fermi level for a -benzoquinonemonoimine zwitterion.

There is compelling evidence of electron pockets, at the Fermi level, in the band structure for an organic zwitterion molecule of the -benzoquinonemonoimine type. The electronic structure of the zwitterion molecular film has a definite, although small, density of states evident at the Fermi level as well as a nonzero inner potential and thus is very different from a true insulator. In spite of a small Brillouin zone, significant band width is observed in the intermolecular band dispersion.