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Scientists have used photoemission to confirm flat-band states in various 2D materials.

In addition, these authors used a technique called angle-resolved photoemission spectroscopy to study the electronic structure at the material’s surface.

As a result, streaking experiments have been unable to determine absolute photoemission delays — time differences between light absorption and electron ejection.

Observation of Dirac cone band dispersions in FeSe thin films by photoemission spectroscopy.

To do so, researchers typically carry out photoemission experiments, in which they shine a single photon of light onto a sample, that in turn kicks out a single electron.