The anomalous temperature dependence of the peak value of giant quantum attenuation of sound in Bi, observed experimentally when two peaks due to both electrons and holes take place simultaneously in a strong magnetic field ( H ∼90 kOe), is explained in the present note as an effect of the fluctuation preceding the first order phase transition of the electron-hole system. Calculation is done for a pure system and more anomalous temperature dependence than observed experimentally is obtained. It will be reduced by the effects of impurities.
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Daijiro Yoshioka (1977) studied this question.
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