1. Experimentelle
Physik 2, Technische Universität Dortmund, 44221 Dortmund, Germany
2. Rzhanov
Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia
3. Institut d’Electronique, de Microélectronique et de Nanotechnologie, CNRS, 59652 Villeneuve-d’Ascq, France
4. Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
5. State
Key Laboratory of Precision Spectroscopy, East China Normal University, 200062 Shanghai, China
6. High
Field
Magnet Laboratory (HFML-EMFL), Radboud University, 6525 ED Nijmegen, The Netherlands
7. Laboratoire de Physique et d’Etude des Matériaux, ESPCI, CNRS, 75231 Paris, France