Erlangen 2018 – scientific programme

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A: Fachverband Atomphysik

A 33: Poster Session II

A 33.15: Poster

Wednesday, March 7, 2018, 16:15–18:15, Redoutensaal

Towards an excition scheme for giant dipole states of Rydberg excitons in Cu2O — •Thomas Stielow, Markus Kurz, and Stefan Scheel — Universität Rostock, Institut für Physik, Albert-Einstein-Straße 23, 18059 Rostock, Germany

An exotic species of Rydberg atoms in crossed eletric and magnetic fields are so-called giant-dipole atoms [1]. They are characterized by an electron-ionic core separation in the range of several micrometers, leading to huge permanent dipole moments of several hundred thousand Debye. So far, these states stay out of reach for observation. Recently, the possible formation of giant dipole states by Rydberg excitons in Cu₂O has been proposed [2]. Excitons observe much stronger couplings to external fields, bringing giant dipole states into the reach of current experiments performed on Cu₂O. We discuss different possible excitation paths leading to giant dipole excitons based on the latest descriptions of excitonic giant dipole states.

[1] O. Dippel, P. Schmelcher, and L. S. Cederbaum, Phys. Rev. A, 49, 4415 (1994).

[2] M. Kurz, P. Grünwald, and S. Scheel, Phys. Rev. B 95,245205 (2017).