"HIGH-TEMPERATURE" OSCILLATIONS OF BISMUTH CONDUCTIVITY IN THE ULTRA-QUANTUM LIMIT

Abstract

The special quantum oscillations of the kinetic coefficients in magnetic field ("high-temperature" oscillations - HTO) discovered by the author in 1974 have been considered. The oscillations are periodic in the reciprocal magnetic field and are characterized by a frequency higher then that of Shubnikov-de Haas (SdH) oscillations. The results of joint studies of SdH oscillations and HTO of the magnetoresistance for pure Bi and alloy BiSb in magnetic field up to 33 T are presented. The oscillations are measured for different magnetic field directions at temperature 4 – 30 K. It was found that SdH holes oscillations and holes HTO reached its quantum limit at the same value of magnetic field. The analysis of the experimental data verified one of two alternative models of HTO.