Temperature dependence of the hyperfine parameters of anomalous muonium in germanium

Abstract

The anomalous-muonium hyperfine interaction in germanium has been measured as a function of temperature between 5 and 100 K. It was found that the component perpendicular to the defect axis decreases while the component parallel to the axis increases as the temperature increases. Both effects are a result of the interaction of anomalous muonium with the germanium-host phonons. The temperature dependences of the anomalous-muonium hyperfine interaction in diamond, silicon, and germanium are compared.