Magnetophonon Resonance in n-Type Germanium at Low Temperatures

Abstract

Investigations of hot electron magnetophonon resonance are carried out in n-Ge at low temperatures (10–20 K) by measuring second derivatives of the longitudinal magnetoconductance with magnetic fields applied in the <100>, <110> and <111> directions and new series which have not been observed at high temperatures are resolved for the first time. In addition to the intravalley magnetophonon resonance due to the \(\varGamma\)-point LO phonons (439 K) intervalley magnetophonon resonance due to the X 1 -point (LA, LO) phonons (347 K) and X 3 -point TA phonons (116 K) are observed in the three directions. In the case of J//B//<111> impurity magnetophonon series due to the emission of the LO phonons and X 4 -point TO phonons (280 K) accompanied by capture of a 1s ground state of donor were detected.