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 o f complex, organic solids with respect to their chemical and orbital charac ter has been approached using soft X-ray absorption (SXA) and soft X-ray em ission (SXE) spectroscopy. These techniques are powerful probes of the site and angular-momentum resolved partial density of states (PDOS) for both oc cupied and unoccupied states. Therefore these spectroscopies are particular ly suited for an analysis of the density of states of multi-atomic, complex materials as the ET-based organic conductors, allowing site-specific elect ronic structure to be measured. We present a preliminary picture of the ele ctronic structure of kappa-ET2Cu(SCN)(2) and kappa-ET2Cu[N(CN)(2)]Br as mea sured by SXE and SXA performed at the C1s and N1s core levels. (C) 1999 Els evier Science B.V. All rights reserved.