Abstract

The current status of the newly emerging technique of ultraviolet inverse photoemission spectroscopy is surveyed. This technique offers the possibility of determining the unoccupied electronic states in solids and surfaces in the same way that ordinary photoemission determines the occupied states. Its special advantage over other ‘empty-state’ spectroscopies is its angle-resolved capability. Examples from recent work on solid-state systems are quoted, and include band mapping in Cu and spin-polarized studies on ferromagnets. Examples from the realm of surface science include studies of empty surface states, image-potential states, chemisorption, and molecular adsorption systems. Instrumentation is also discussed, with special reference to the next-generation grating spectrographs already under construction.

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