Two-dimensional topological insulators(2DTIs)have attracted increasing attention during the past few years.New 2DTIs with increasing larger spin-orbit coupling(SOC)gaps have been predicted by theoretical calculations ...Two-dimensional topological insulators(2DTIs)have attracted increasing attention during the past few years.New 2DTIs with increasing larger spin-orbit coupling(SOC)gaps have been predicted by theoretical calculations and some of them have been synthesized experimentally.In this review,the 2DTIs,ranging from single element graphene-like materials to bi-elemental transition metal chalcogenides(TMDs)and to multi-elemental materials,with different thicknesses,structures,and phases,have been summarized and discussed.The topological properties(especially the quantum spin Hall effect and Dirac fermion feature)and potential applications have been summarized.This review also points out the challenge and opportunities for future 2DTI study,especially on the device applications based on the topological properties.展开更多
Self-assembly and growth of manganese phthalocyanine （MnPc） molecules on an Au（111） surface is investigated by means of low-temperature scanning tunneling microscopy. At the initial stage, MnPc molecules preferent...Self-assembly and growth of manganese phthalocyanine （MnPc） molecules on an Au（111） surface is investigated by means of low-temperature scanning tunneling microscopy. At the initial stage, MnPc molecules preferentially occupy the step edges and elbow sites on the Au（111） surface, then they are separately adsorbed on the face-centered cubic and hexagonal closely packed regions due to a long-range repulsive molecule-molecule interaction. After the formation of a closely packed monolayer, molecular islands with second and third layers are observed.展开更多
基金Project supported by the Beijing Natural Science Foundation,China(Grant Nos.Z190006 and 4192054)the National Natural Science Foundation of China(Grant Nos.61971035,61901038,and 61725107)+1 种基金Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB30000000)Beijing Institute of Technology Research Fund Program for Young Scholars(Grant No.3050011181814).
文摘Two-dimensional topological insulators(2DTIs)have attracted increasing attention during the past few years.New 2DTIs with increasing larger spin-orbit coupling(SOC)gaps have been predicted by theoretical calculations and some of them have been synthesized experimentally.In this review,the 2DTIs,ranging from single element graphene-like materials to bi-elemental transition metal chalcogenides(TMDs)and to multi-elemental materials,with different thicknesses,structures,and phases,have been summarized and discussed.The topological properties(especially the quantum spin Hall effect and Dirac fermion feature)and potential applications have been summarized.This review also points out the challenge and opportunities for future 2DTI study,especially on the device applications based on the topological properties.
基金Project supported by the National Basic Research Program of China (Grant Nos.2009CB929103 and 2006CB921305)the National Natural Science Foundation of China (Grant No.200973196)
文摘Self-assembly and growth of manganese phthalocyanine （MnPc） molecules on an Au（111） surface is investigated by means of low-temperature scanning tunneling microscopy. At the initial stage, MnPc molecules preferentially occupy the step edges and elbow sites on the Au（111） surface, then they are separately adsorbed on the face-centered cubic and hexagonal closely packed regions due to a long-range repulsive molecule-molecule interaction. After the formation of a closely packed monolayer, molecular islands with second and third layers are observed.
