6 papers
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}…