Nature research paper: Anomalous intense coherent secondary photoemission from a perovskite oxide
We are providing an unedited version of this manuscript to give early access to its findings. Before final publication, the manuscript will undergo further editing. Please note there may be errors present which affect the content, and all legal disclaimers apply.Photocathodes—materials that convert photons into electrons using the photoelectric effect—are a critical foundation for many modern technologies that rely on light detection or electron-beam generation.
Progress in this mature field has been limited to refinements in photocathode performance based on sophisticated materials engineering single crystals prepared by simple vacuum annealing that go beyond the existing theoretical descriptionssurface produces discrete secondary photoemission spectra at room temperature, characteristic of the efficient negative-electron-affinity photocathode materials.
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