Abstract
We find that at intermediate temperatures, the metallic temperature dependence of the conductivity of two-dimensional electrons in silicon is described well by a recent interaction-based theory of Zala et al. [Phys. Rev. B 64, 214204 (2001)]. The tendency of the slope to diverge near the critical electron density is in agreement with the previously suggested ferromagnetic instability in this electron system. Comparing theory and experiment, we arrive at a conclusion that the instability, unexpectedly, originates from the sharp enhancement of the effective mass, while the effective Landé g factor remains nearly constant and close to its value in bulk silicon.
- Received 13 May 2002
DOI:https://doi.org/10.1103/PhysRevB.66.073303
©2002 American Physical Society