| AVS 58th Annual International Symposium and Exhibition | |
| Surface Science Division | Tuesday Sessions |
| Session SS-TuP |
| Session: | Surface Science Poster Session |
| Presenter: | Lazaro Huerta, Universidad Nacional Autonoma de Mexico |
| Authors: | L. Huerta, Universidad Nacional Autonoma de Mexico R. Falconi, Universidad Juárez Autónoma de Tabasco, Mexico M. Flores, Universidad de Guadalajara, Mexico A. Duran, Universidad Nacional Autonoma de Mexico R. Escamilla, Universidad Nacional Autonoma de Mexico |
| Correspondent: | Click to Email |
The effect of carbon in the structure of Mo2B is increasing the superconducting transition temperature from 5.8 K to 7.5K. Polycrystalline samples of the Mo2B and Mo2BC were synthesized by the arc melting technique. The samples were characterized by x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS). XRD results shown that when carbon atoms are added to the structure of the Mo2B compound a transition structural from body centered tetragonal to face centered orthorhombic is induced forming the Mo2BC compound. XPS spectra revealed the presence of the Mo 3d, C 1s, and O 1s core levels associated to the chemical states Mo2B and Mo2BC. In order to explain the increase of transition temperature in the Mo2B doped with carbon, we measured the valence band spectra (XPS and UPS), the results were compared with the density of states at the Fermi level N(EF) of Mo2B and Mo2BC.