Peierls structural transition in quasi-one-dimensional organic crystals
Peierls transition in quasi-one-dimensional organic crystals of tetrathiofulvalene-tetracyanoquinodimethane (TTF-TCNQ) type is studied in the case where the conduction band is half filled and Fermi dimensionless quasi momentum kF = π/2 and where the concentration of conduction electrons is reduced a...
Guardado en:
| Autores principales: | , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2013
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/2f46aad5e56641aca1193b2d3bc7aa5b |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | Peierls transition in quasi-one-dimensional organic crystals of tetrathiofulvalene-tetracyanoquinodimethane (TTF-TCNQ) type is studied in the case where the conduction band is half filled and Fermi dimensionless quasi momentum kF = π/2 and where the concentration of conduction electrons is reduced and the band is filled up to a quarter of the Brillouin zone, kF = π/4. In the physical model of the crystal, it was simultaneously taken into account two the most important interactions of conduction electrons with the longitudinal acoustic phonons. The dispersion equation for renormalized phonons was deduced and solved numerically. The phonon frequency dependences on quasi momentum projection along molecular wires were calculated for different temperatures. The critical temperature of transition was determined. |
|---|