基金support from Singapore Ministry of Education via Ac RF Tier3 Programme“Geometrical Quantum Materials”(MOE2018-T3-1-002),Ac RF Tier2 grant(MOE2017-T2-1-040)and Tier1 grant(RG 194/17)funding from the National Research Foundation,Prime Ministers Office,Singapore,under its Medium-Sized Centre Programmethe funding from MOE2017-T2-2-139。