1. School of Physics and Astronomy and Key Laboratory of Artificial Structures and Quantum Control, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
2. School of Science, The University of New South Wales at the Australian Defence Force Academy, Canberra, Australian Capital Territory 2600, Australia
3. College of Physics, Jilin University, Changchun 130012, China
4. Institute for Superconductivity and Electronic Materials, University of Wollongong, Wollongong, New South Wales 2500, Australia
5. Australian Centre for Neutron Scattering, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
6. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, United States