The THz Magnetoconductivity Tensor in a High Mobility Two-Dimensional Electron Gas

摘要

Using THz-time-domain magneto-spectroscopy, we have studied the dynamics of a 2DEG (3.4×10~6 cm~2 V~(-1) s~(-1)) as a function of temperature (0.4 K-100 K). The decoherence lifetimes increase monotonically as temperature decreases below 1 K. We will discuss the mechanisms that contribute to the lifetimes.