Strain-induced Magnetoconductance in Germanium Whiskers

Germanium whiskers with gallium concentration $2\times 10^{17}\mathrm {c}\mathrm {m}^{-3}$ were chosen to investigate magnetoconductance in the range 0-14 T at 4.2 K under compressive strain up to - $2\times 10^{-3}$ rel.un. Strain influence on spin-orbital splitting on the valence band spectrum was studied. As result, the splitting of light and heavy hole branches was found under compressive strain according to kp-method. The spin splitting energy $\Delta \mathrm {s}\mathrm {o}$ as well as Rashba cubic parameter $\beta \mathrm{so}$ was found due to studying the longitudinal magnetoconductance of Ge whiskers at low temperatures.