ELECTRONIC STRUCTURE OF α AND β-PHASE OF POLY (VINYLIDENE FLUORIDE)
Titel:
ELECTRONIC STRUCTURE OF α AND β-PHASE OF POLY (VINYLIDENE FLUORIDE)
Auteur:
Li, J. C. Wang, C. L. Yang, K. Wang, X. Y. Zhao, M. L. Zhang, J. L.
Verschenen in:
Integrated ferroelectrics
Paginering:
Jaargang 78 (2006) nr. 1 pagina's 27-33
Jaar:
2006-11-01
Inhoud:
The pseudopotential methods have been employed to investigate the electronic structures of α and β-PHASE poly (vinylidene fluoride). In the energy band structure of β-PHASE PVDF, a large dispersion of the valence band is found only along the chain direction, which agrees well with the angle-resolved photoemission experiments and implies the quasi-one-dimensional nature of β-PHASE PVDF. The large dispersion of the LUOM is caused by H s, C2 s p state mainly. The energy band structure of β-PHASE exhibits anisotropy, while isotropy is found in the energy band of α -phase PVDF.