Density of states of Pb1 Si/SiO2 interface trap centers

Abstract
The electronic properties of the (100) Si/SiO 2 interfacial defect called P b1 are quite controversial. We present electron spin resonance measurements that demonstrate: (1) that the P b1 defects have levels in the silicon band gap, (2) that the P b1 correlation energy is significantly smaller than that of the P b1 defect, and (3) that the P b1 levels are skewed toward the lower part of the silicon band gap.