Beats of quantum oscillations of the hall coefficient and resistivity in semiconductor alloys n-Bi0.93Sb0.07 at a small deviation of the magnetic field direction from the trigonal axis

Abstract

Quantum oscillations of the resistivity ρ22 and Hall coefficient R 12.3 in the semiconductor alloy n-Bi0.93Sb0.07 have been studied at H ‖ C 3 and j ‖ 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 ρ22 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°.