National;
Laboratory;
for;
Condensed;
Matter;
Physics,;
Institute;
of;
Physics,;
Chinese;
Academy;
of;
Sciences,;
Beijing;
100190,;
China;
Branch,;
Institute;
of;
High;
Energy;
Physics,;
Chinese;
Academy;
of;
Sciences,;
Dongguan;
523800,;
China;