1. National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China
2. Kuang Yaming Honors School, Nanjing University, Nanjing 210023, China
3. Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Germany
4. Institute of Theoretical Physics, Technische Universität Dresden, 01069 Dresden, Germany
5. Departament d’Enginyeria Quimica, Universitat Rovira i Virgili, 26 Av. dels Paisos Catalans, 43007 Tarragona, Spain