We have investigated the electronic structure of MgB2 using x-ray Raman scattering at the boron K edge in a single crystal sample. Using both the direction and the magnitude dependence of the momentum transfer we can identify the spatial orientation of empty electronic states with different symmetries. The local symmetry-resolved electronic structure of MgB2 is analyzed using two independent first-principles computational approaches. We show that near the Fermi level the density of s symmetry states is vanishingly small. We also identify and separate the contributions from boron pxy(σ) and pz(π) states, which play an important role in determining the superconducting properties of MgB2.
ASJC Scopus subject areas
- Physics and Astronomy(all)