Beats of quantum oscillations of the hall coefficient and resistivity in semiconductor alloys n-Bi_(0.93)Sb_(0.07) at a small deviation of the magnetic field direction from the trigonal axis

摘要

Quantum oscillations of the resistivity ρ_(22) and Hall coefficient R_(12.3) in the semiconductor alloy n-Bi_(0. 93)Sb_(0. 07) have been studied at H {norm of matrix} C_3 and j {norm of matrix} C_1 in magnetic fields to 14 T and at temperatures of 1.5, 4.5, 10, and 20 K. At temperatures of 1.5 and 4.5 K, beats of quantum oscillations of ρ_(22) and R _(12. 3) due to a small deviation of the magnetic field H from the crystallographic C_3 axis have been observed. To determine the oscillation period Δ_i, cyclotron mass m_(ci), cyclotron frequency ω_(ci), and extreme section S_(extri), experimentally measured quantum oscillation beats have been compared with the model beats of oscillations of three harmonic functions, two of which have close frequencies. The deviation of the parameters Δ_i, m_(ci), and S_(extri) from the same parameters when the magnetic field H exactly coincides with the trigonal C_3 axis has made it possible to estimate the magnetic field H deflection angle from the trigonal C_3 axis, which is ~1°.