Effect of Hydrostatic Pressure on the Fermi Surface of Bi

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Abstract
We present data on the pressure dependence of the smallest extremal cross-sectional areas of both the hole and electron sheets of the Fermi surface of Bi. The cross sections were determined from measurements of the frequency of de Haas-van Alphen oscillations detected with the field modulation technique. Pressure derivatives obtained using solid He and fluid He were in excellent agreement, thus removing any doubts about the hydrostatic nature of the stress in the solid-He portions of the work. Values for the pressure derivatives of the effective masses associated with these cross sections were obtained from magnetization-amplitude-versus-temperature measurements in solid He to ∼4 kbar. Our values for the pressure derivatives of the cross sections and masses differ in detail from and have somewhat less uncertainty than the most recent literature values. No change in the initial phase of the de Haas-van Alphen oscillations associated with the smallest extremal cross-sectional area of the hole sheet was detected in contrast to the findings of Overton and Berlin-court.