Spin-orbit interaction of charge carriers with impurities in aligned Ge0.99Me0.01 (Me = Mn, Cr, Co, Fe) nanowires

Abstract

Aligned Ge0.99Me0.01 (Me = Mn, Cr, Co, Fe) nanowires have been investigated by electron spin resonance (ESR). Resonance lines corresponding to a magnetically ordered subsystem of localized spins (clusters of Ge alloys with transition metals) and an asymmetric Dysonian line, corresponding to the ESR of charge carriers in Ge, are identified in the ESR spectra. A systematic decrease in the effective g factor of the asymmetric Dysonian line with enhancement of spin-orbit interaction is found in the series of transition-metal ions Mn2+, Cr2+, Fe3+, and Co2+, which were used to dope Ge nanowires.