1. Crystal Growth Lab, Materials for Electronics and Energy Technology (i-MEET), Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
2. Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
3. Electron Devices (LEB), Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
4. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan