Linear approximation to dynamical low-energy electron diffraction

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Abstract
A linear approximation to dynamical low-energy electron diffraction (LEED) is proposed, called linear LEED (LLEED). It may hold the key to the solution of complex surface structures with large atomic displacements, in a way complementary to tensor LEED. More ambitious possibilities also present themselves, based on direct inversion schemes and related in spirit to holographic ideas. Linear LEED relies on the approximate linear independence of diffracted amplitudes from subunits such as atoms or molecules, and reduces enormously the number of full dynamical LEED calculations needed in a structural search.