Shubnikov–de Haas oscillations in Bi bicrystals with superconducting crystallite interfaces of twisting type

Abstract

It is an investigation of quantum oscillations ofρij (H) (Hall resistance and magnetoresistance) in Bi bicrystals with superconducting interface of twisting type, converted by magnetic field and/or a current in the normal state. It is established that the elongation of FS in adjacent layers changes (FS is rotated in comparison with the ones in crystallites) and the hole ellipsoid of revolution in pure Bi turns to a deformed hole pocket with all three main cross-sectional areas different on size. The hole FS of the central part of LDA bicrystals in the investigated angular intervals of the magnetic field rotation is almost similar to FS of the adjacent layers and both considerably surpass in volume the hole isoenergetic surface of single crystalline Bi.