Rotation effects of elongated dust grains on a surface dust-acoustic wave in a semi-bounded dusty plasma

The surface dust-acoustic wave is investigated in a semi-bounded dusty plasma containing elongated and rotating dust grains. The dispersion relation of the low-frequency surface ion plasma wave is obtained by the plasma dielectric function with the specular reflection boundary condition. The results show that the phase and group velocities of the surface dust-acoustic wave propagating along the plasma-vacuum interface decrease with an increase of the rotation frequency. However, for long wavelengths it is found that the phase and group velocities of the surface wave are independent of the magnitude of the rotation frequency.