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Excitons in soliton and bipolaron lattice states of doped Peierls systems
Kikuo Harigaya, Yukihiro Shimoi, Shuji Abe
Exciton effects on soliton and bipolaron lattice states are investigated using an electron-lattice Peierls model with long-range Coulomb interactions. The Hartree-Fock (HF) approxi…
Exciton effects in soliton and bipolaron lattice states of doped electron-phonon Peierls systems
Kikuo Harigaya, Yukihiro Shimoi, Shuji Abe
Exciton effects on soliton and bipolaron lattice states are investigated using an electron-lattice Peierls model with long-range Coulomb interactions. The Hartree-Fock (HF) approxi…
Optical response of C and C fullerenes:
Kikuo Harigaya, Shuji Abe
Molecular exciton effects in the neutral and maximally doped C (C) are considered using a tight binding model with long-range Coulomb interactions and bond disorder.…
Optical Absorption in C_70 and C_76: Effects of Symmetry Reduction
Kikuo Harigaya, Shuji Abe
Optical absorption spectra of C_70 and C_76 are calculated by a tight binding model with a long ranged Coulomb interaction. The spectrum of C_70 is in overall agreement with the ex…
Nonlinear Optical Response of C60 Molecules
Kikuo Harigaya, Shuji Abe
The third-order nonlinear optical susceptiblity chi(3) of a C60 molecule is calculated by using a free-electron model as well as by taking Coulomb interactions into account. The fr…
Dispersion of the Third-Order Nonlinear Optical Susceptibility in C_{60} Calculated with a Tight-Binding Model
Kikuo Harigaya, Shuji Abe
The frequency dependence of third harmonic generation (THG) in C_{60} is calculated, making use of a tight-binding model for pi-electrons. The magnitudes of the THG, about 10^{-12}…