Temperature dependence of many-body effects in inversion layers

The temperature-dependent self-energies of the lowest three subbands in a Si(100) surface inversion layer are evaluated in the plasmon-pole approximation for the screened interaction. The magnitudes of the self-energies decrease with increasing temperature. For the excited subbands the self-energies show very similar dependence on temperature. At low concentration the quasiparticle energy differences are independent of temperature, but at higher concentrations these subband separations increase slightly with temperature. © 1978 The American Physical Society.