Molecular components of the bulk electronic structure of organic conductors: A Soft X-ray Absorption and Soft X-ray Emission spectroscopy approach

The problem of resolving molecular components of the electronic structure of complex, organic solids with respect to their chemical and orbital character has been approached using soft X-ray absorption (SXA) and soft X-ray emission (SXE) spectroscopy. These techniques are powerful probes of the site and angular-momentum resolved partial density of states (PDOS) for both occupied and unoccupied states. Therefore these spectroscopies are particularly suited for an analysis of the density of states of multi-atomic, complex materials as the ET-based organic conductors, allowing site-specific electronic structure to be measured. We present a preliminary picture of the electronic structure of κ-ET₂Cu(SCN)₂ and κ-ET₂Cu[N(CN)₂]Br as measured by SXE and SXA performed at the C1s and N1s core levels.