2 School of Physics, Georgia Institute of Technology, 30332, Atlanta, GA, USA.
3 Neutron Scattering Division, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA.
4 NIST Centre for Neutron Research, National Institute of Standards and Technology, 20899, Gaithersburg, MD, USA.
5 Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109, Berlin, Germany.
6 National High Magnetic Field Laboratory, Florida State University, 32310, Tallahassee, FL, USA.
7 Department of Physics and Astronomy, University of Tennessee, 37996, Knoxville, TN, USA.
8 Neutron Scattering Division and Shull-Wollan Center, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA.
9 Department of Physics and Astronomy, University of Tennessee, 37996, Knoxville, TN, USA. jma3@sjtu.edu.cn.
10 Key Laboratory of Artificial Structures and Quantum Control, Department of Physics and Astronomy, Shanghai Jiao Tong University, 200240, Shanghai, China. jma3@sjtu.edu.cn.
11 Collaborative Innovation Center of Advanced Microstructures, 210093, Nanjing, Jiangsu, China. jma3@sjtu.edu.cn.
The original version of this Article omitted the following from the Acknowledgements: 'J. Ma's primary affiliation is Shanghai Jiao Tong University.' This has been corrected in both the PDF and HTML versions of the Article.