We develop the Valence Effective Hamiltonian method to calculate the magnetic dipole (MD) and electric quadrupole (EQ) contributions to the hyperpolarizability β of molecular systems. For both the C60 and C70 molecules, we find that the MD contribution leads to a β value which is several times larger than that of the EQ contribution. Taking into account the local field correction factor for C60 in solid state, we calculate X(2) susceptibility values that are in excellent agreement with recent experimental data.
|Original language||English (US)|
|Number of pages||6|
|Journal||Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals|
|State||Published - Jan 1 1994|
ASJC Scopus subject areas
- Condensed Matter Physics