148 citations · 285 across the 14 of their papers we have counts for
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New type of antiferromagnetic state in stacked nanographite
Kikuo Harigaya
Nanographite systems, where graphene sheets of the orders of the nanometer size are stacked, show novel magnetic properties, such as, spin-glass like behaviors and the change of ES…
Local Non-Fermi Liquid Theory of Magnetic Impurity Effects in Carbon Nanotubes
K. Harigaya
Magnetic impurity effects in carbon nanotubes are studied theoretically. The multi channel Kondo effect is investigated with the band structure of the metallic nanotubes. The local…
Impurity scattering in metallic carbon nanotubes with superconducting pair potentials
Kikuo Harigaya
Effects of the superconducting pair potential on the impurity scattering processes in metallic carbon nanotubes are studied theoretically. The backward scattering of electrons vani…
Electronic states of metallic and semiconducting carbon nanotubes with bond and site disorder
Kikuo Harigaya
Disorder effects on the density of states in carbon nanotubes are analyzed by a tight binding model with Gaussian bond or site disorder. Metallic armchair and semiconducting zigzag…
Photophysical Properties in C60 and Higher Fullerenes
Kikuo Harigaya
The optical excitations in C and higher fullerenes, including isomers of C, C, and C, are theoretically investigated. We use a tight binding model with…
Metallic and insulating states in two-dimensional C60-polymers
Kikuo Harigaya
Variations in the band structures of the two-dimensional C60-polymers are studied, when pi-conjugation conditions are changed. We investigate the rectangular and triangular polymer…