Abstract
X-ray-scattering measurements on several newly synthesized, high-purity metal-phthalocyanine-iodine quasi-one-dimensional conductors reveal that, in contrast to previous materials, the iodine sublattice is ordered at all temperatures. The crystal symmetry is thus modified from tetragonal P4/mcc to monoclinic P2/c with a supercell unit volume three times larger. This new symmetry, which does not modify the dispersion of the one-dimensional band structure in the vicinity of the Fermi level, is consistent with the metallic behavior of the M(pc)I family. However, a metal-insulator transition could be induced if the c glide-plane symmetry of P2/c is broken due to the stabilization of a 2kF density-wave ground state.
Original language | English (US) |
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Pages (from-to) | 14861-14866 |
Number of pages | 6 |
Journal | Physical Review B |
Volume | 51 |
Issue number | 21 |
DOIs | |
State | Published - 1995 |
ASJC Scopus subject areas
- Condensed Matter Physics