Chao Wang†, Qiang Wang†, Jun Xu*, Guodong Qi, Pan Gao, Weiyu Wang, Yunyun Zou, Ningdong Feng, Xiaolong Liu and Feng Deng*
National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, China
† These authors contributed equally to this work.