Photoionization cross sections of a two-electron donor center in siliconT.H. NingC.T. Sah1976Physical Review B
Electron scattering in silicon inversion layers by oxide and surface roughnessA. HartsteinT.H. Ninget al.1976Surface Science
Effects of inhomogeneities of surface-oxide charges on the electron energy levels in a semiconductor surface-inversion layerT.H. NingC.T. Sah1974Physical Review B