The Yamaji Ocsillations of the Ultrasonic Attenuation in the Quasi Two Dimensional Systems with the Periodically Undulating Fermi Surfaces.

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  • Itou Yoshihide
    Department of Physics, Kyushu University, Ropponmatsu, Fukuoka 810-8560
  • Narita Kouichirou
    Department of Physics, Kyushu University, Ropponmatsu, Fukuoka 810-8560
  • Inoue Seiichirou
    Department of Physics, Kyushu University, Ropponmatsu, Fukuoka 810-8560

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  • The Yamaji Ocsillations of the Ultrasonic Attenuation in the Quasi Two Dimensional System with the Periodically Undulating Fermi Surfaces
  • Yamaji Ocsillations of the Ultrasonic Attenuation in the Quasi Two Dimensional System with the Periodically Undulating Fermi Surfaces

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The ultrasonic attenuation is investigated for such quasi two dimensional systems with periodically undulating cylindrical Fermi surfaces as organic metals and superlattices. We obtained the most general forms of the ac-nonlocal magnetoconductivity, which becomes the dc-local magnetoconductivity obtained earlier in the limit of the high magnetic strength, where both the frequency and wave number can be assumed to become zero. The directional dependence of the magnetic field on the ultrasonic attenuation, one of what we call the Yamaji oscillations, appears in the high-field limits, only for longitudinal waves propagating parallel to the c-axis and for transverse waves polarized along the c-axis in the case of propagation in the plane perpendicular to the c-axis.

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