Abstract
measurements have been performed to investigate the nature of the insulating state of a quasi-one-dimensional conductor, , with a quarter-filled band. The charge-density wave has been evidenced below about 220 K by the line separation of the spectra, which shows a clear charge disproportionation instead of the lattice dimerization encountered in most cases. The present case demonstrates the Wigner crystallization of electrons in the charge-transfer salt and a crucial role of the long-range Coulomb interaction.
- Received 9 June 1997
DOI:https://doi.org/10.1103/PhysRevLett.80.4737
©1998 American Physical Society