First-order transition to a metallic state in polyacetylene: A strong-coupling polaronic metal
Abstract
We present a theory of the first-order transition to the metallic state in polyacetylene in terms of a crossover from a lattice of charged solitons to a regular array of polaronlike distortions. The polaronic metal is shown to have a strong indirect attractive interaction, U*~=-2Δ/3, between electrons in the half-filled, narrow, polaron subband within the Peierls energy gap (Eg=2Δ).
- Publication:
-
Physical Review Letters
- Pub Date:
- July 1985
- DOI:
- 10.1103/PhysRevLett.55.308
- Bibcode:
- 1985PhRvL..55..308K
- Keywords:
-
- Band Structure Of Solids;
- Ground State;
- Particle Interactions;
- Phase Transformations;
- Polyacetylene;
- Coupling;
- Energy Gaps (Solid State);
- Lattice Parameters;
- N-Type Semiconductors;
- Polarons;
- Solid-State Physics;
- 71.30.+h;
- 71.38.+i;
- 72.80.Le;
- 74.20.-z;
- Metal-insulator transitions and other electronic transitions;
- Polymers;
- organic compounds;
- Theories and models of superconducting state