Dresden 2017 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 36: Postersession I

DS 36.53: Poster

Mittwoch, 22. März 2017, 17:00–19:00, P2-EG

Influence of strain on the binding energies of Rydberg excitons in Cu₂O — •Sjard Ole Krüger, Peter Grünwald, Florian Schöne, and Stefan Scheel — Institut für Physik, Universität Rostock, D-18059 Rostock, Germany

In recent years, excitons in Cu₂O have emerged as a promising platform for the study of Rydberg physics [1], showing a strong Rydberg blockade. Experiments examining the collective behaviour of multi-exciton systems often employ effective trapping potentials which can be induced by nonuniform straining of the crystal. One experimental advantage of Rydberg excitons over Rydberg atoms is the feasibility of almost arbitrary trap geometries. Here, we will examine the influence of a uniform strain on the Rydberg exciton resonances in Cu₂O as a preliminary step to the description of Rydberg excitons in such traps. This will be achieved by the inclusion of the strain-induced deformation of the Γ₇⁺ valence band [2] in numerical calculations, which include the full valence band nonparabolicity [3].

[1] T. Kazimierczuk et al., Nature 514, 7522 (2014)

[2] K. Suzuki and J.C. Hensel, Phys. Rev. B 9, 10 (1974)

[3] F. Schöne et al., Phys. Rev. B. 93, 075203 (2016)