Abstract
Cyclotron resonance of two-dimensional electrons is studied at low temperatures down to 0.4 K for a high-mobility quantum well which exhibits a metallic temperature dependence of dc resistivity . The relaxation time shows a negative temperature dependence, which is similar to that of the transport scattering time obtained from . The ratio at 0.4 K increases as the electron density decreases, and exceeds unity when approaches the critical density for the metal-insulator transition.
- Received 14 February 2011
DOI:https://doi.org/10.1103/PhysRevLett.106.196404
© 2011 American Physical Society