| AVS 60th International Symposium and Exhibition | |
| Surface Science | Tuesday Sessions |
| Session SS-TuP |
| Session: | Surface Science Poster Session |
| Presenter: | L. Huerta, Universidad Nacional Autónoma de México |
| Authors: | L. Huerta, Universidad Nacional Autónoma de México R. Escamilla, Universidad Nacional Autónoma de México M. Flores, Universidad de Guadalajara, Mexico L. Rivera, Universidad Nacional Autónoma de México M. Romero, Universidad Nacional Autónoma de México |
| Correspondent: | Click to Email |
X-ray Photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) were used to investigate the binding energies and valence band for the NbC and MoC phases. The NbC and MoC polycrystalline samples superconducting were synthesized by arc melting. X-ray diffraction pattern showed that the samples were essentially single phase. The Nb 3d, Mo 3 d and C 1s core levels associated to the chemical states of NbC and MoC were identified. Comparing the Nb 3d, Mo 3d and C 1s core levels with metallic Nb, Mo and C reference materials, we observed a positive chemical shift for Nb 3d and Mo 3d a negative chemical shift for C 1s in both samples. These results suggest that the charge transfer model based on the concept of electronegativity is applicable on the NbC and MoC compounds.