About the Authors

Laurin Lengert

lengert@fkp.tu-darmstadt.de

Affiliation Institute for Condensed Matter Physics, TU Darmstadt, Darmstadt, Germany

Barbara Drossel

Affiliation Institute for Condensed Matter Physics, TU Darmstadt, Darmstadt, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LL BD. Performed the experiments: LL. Analyzed the data: LL BD. Wrote the paper: LL BD.