[1
]Department of Physics and Hefei National Laboratory for Physical Sciences at the Microscale,
University of Science and Technology of China, Hefei, Anhui 230026, People's Republic
of China
[2
]Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences,
Hefei, Anhui 230026, People's Republic of China
[3
]School of Nuclear Science and Technology, University of Science and Technology of
China, Hefei, Anhui 230026, People's Republic of China
[4
]National Institute for Material Science, Tsukuba, Ibaraki 305-0047, Japan