1. Ecole Polytechnique Fédérale de Lausanne, ICMP, station 3, 1015 Lausanne, Switzerland
2. University of Applied Sciences and Arts Western Switzerland, HEIG-VD/MNT/LAPTE, Avenue des Sports 20, 1401 Yverdon-les-Bains, Switzerland
3. Spintronics Interdisciplinary Center, Beihang University, No. 37 Xueyuan Road, Haidian, Beijing 100191, China