Cyclotron Resonance of Two Dimensional Electrons near the Metal-Insulator Transition

摘要

We have performed the cyclotron resonance measurements on two-dimensional (2D) electrons near the metal-insulator transition. Both the cyclotron scattering time (tau)_(CR) and the transport scattering time (tau)_(t) exhibit a metallic temperature dependence. This fact suggests that the electron state of the metallic phase does not change so much under 100 GHz millimeter-wave radiation. The values of (tau)_(t)/(tau)_(CR) are close to unity, indicating that short-range potential fluctuations which lead to large angle scattering are dominant in the metallic phase of Si/SiGe.