Project leader: Ville Härkönen    Personnel

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Background

The description of solids is almost always based on the Born–Oppenheimer (BO) approximation made in the Coulombic description of the quantum-mechanical many-body problem of electrons and nuclei. At the same time, there is theoretical and experimental evidence that beyond-BO ef-fects may play a role in determining the properties of solids composed of light elements. There are many phenomena and systems where such effects are of potential interest, including supercon-ductivity in hydrides, hydrogen storage, solid hydrogen, and solids of light elements in general.