Electron-hole counts in Al-substituted MgB2 superconductors from x-ray Raman scattering
作者： A. Mattila , J. A. Soininen , S. Galambosi , T. Pylkkänen , S. Huotari
DOI: 10.1103/PHYSREVB.78.064517
关键词: Raman scattering 、 Raman spectroscopy 、 Mott scattering 、 Biological small-angle scattering 、 Scattering 、 Phonon scattering 、 Atomic physics 、 Physics 、 X-ray Raman scattering 、 Inelastic scattering
摘要: We have investigated the electronic structure of Mg0.83Al0.17B2 and MgB2 single crystals using x-ray Raman scattering at B-K edge. Utilizing momentum transfer dependence process, together with first-principles multiple calculations, we extracted site symmetry projected density empty B states in presence a core hole. In comparison to for pure MgB2, find B--band hole count decrease Fermi level by 35 9%. The -band is relatively stable 4 7% increase compared MgB2. These results shed light on role band filling lowering Tc. Our work opens an application area extraction scheme studies doped systems.
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