Analysis of the resistance of two-dimensional holes in SiGe over a wide temperature range

The temperature dependence of a system exhibiting a ‘metal–insulator transition in two dimensions at zero magnetic 2eld’ (MIT) is studied up to 90 K. Using a classical scattering model we are able to simulate the non-monotonic temperature dependence of the resistivity in the metallic high density regime. We show that the temperature dependence arises from a complex interplay of metallic andinsulating contributions containedin the calculation of the scattering rate 1 =� D(E; T ), each dominating in a limited temperature range. ? 2002 Elsevier Science B.V. All rights reserved.