About the Authors

Wolfram Möbius, Ulrich Gerland
Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience, Ludwig-Maximilians Universität München, Munich, Germany

Corresponding Author

gerland@lmu.de

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WM UG. Analyzed the data: WM. Wrote the paper: WM UG.