Surface analysis - Photo Electron Spectroscopy

3 important questions on Surface analysis - Photo Electron Spectroscopy

What does ARPES stand for?

angular resolved photoelectron spectroscopy

Which conservation laws are used for ARPES? (+formula)

  • Conservation of energy AeIryNXKgRWKgAAAABJRU5ErkJggg==
  • Conservation of (parallel!) momentum   rq37PLPembQAAAABJRU5ErkJggg==
  • uvljib1xXAAlgAfwiQrhSH+W6czwJIR7obMiVOrQ is not conserved! (= 0 for surface electrons)

Which assumption is made in deriving the dispersion relation using ARPES? And is the assumption always valid?

In the conservation of momentum, the momentum of the photon is ignored. This is not always a valid assumption!!

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