Table 1 Binding energies (in eV) of core level spectra for all the samples and the valence band maximum (VBM) values (in eV) for the bulk InP and HfAlO (30 nm)/InP samples
InP (bulk) | HfAlO (30 nm)/InP | HfAlO (4 nm)/InP | |
---|---|---|---|
In 3d 5/2 | 444.46 | – | 444.42 |
Hf 4f 7/2 | – | 17.61 | 17.32 |
Al 2p 3/2 | – | 74.46 | 74.21 |
VBM | 0.79 ± 0.05 | 2.89 ± 0.05 | – |