1. Centre for Condensed Matter and Materials Physics, School of Physics and Astronomy, Queen Mary University of London, Mile End Road, London E1 4NS, U.K.
2. ISIS Facility, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire OX11 0QX, U.K.
3. College of Computer Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People’s Republic of China
4. College of Physics, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People’s Republic of China
5. Department of Physics, School of Sciences, Wuhan University of Technology, 205 Luoshi Road, Hongshan district, Wuhan, Hubei 430070, People’s Republic of China