1301.4999 (J. E. Hirsch)

Prediction of unexpected behavior of the mean inner potential of
superconductors    [PDF]

J. E. Hirsch

Electron holography can measure the mean inner electric potential of materials. The theory of hole superconductivity predicts that when a material is cooled into the superconducting state it expels electrons from its interior to the surface, giving rise to a mean inner potential that increases with sample thickness. Instead, in a normal metal and in a conventional BCS superconductor the mean inner potential is expected to be independent of sample thickness and temperature. Thus, this experiment can provide a definitive test of the validity of the theory of hole superconductivity.

View original: http://arxiv.org/abs/1301.4999