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A: Fachverband Atomphysik

A 10: Collisions, scattering and correlation phenomena

A 10.5: Vortrag

Dienstag, 10. März 2020, 15:15–15:30, a320

A New Super Current — •Hubert Klar — Universität Freiburg, Germany

We treat slow electron scsttering from a highly excited Rydberg atom. The electron-target interaction i nolonger controled by single particle Coulomb forces but by by a potential ridge between Coulomb valleys in the potential surface. We show that the diffraction fromthe ridge leads to adichromatic splitting of that surface. In the incoming channel the ridge becomes flat and allows to the electrons to jump onto the top of the ridge. That motion is unstable, but shows an electron-electron attraction. The pair moves towards the nucleus, and is reflected due to a new fictitious force relected. The outgoing wave on the ridge top is unstable. the pair decays into a bound Rydberg state of the target and one escaping electron. The latter is attracted by a neighbor atom, and the above described process may be repeated many times. In this way one electron is transported without any ineleastic collision through a multiatom material. In contrast to a Couper pair our pair formation works independent of the temperatur, and explains the high temperatur super conductivity.