Hg Te(111)surface is comprehensively studied by scanning tunneling microscopy/spectroscopy(STS).In addition to th√e prim√itive(1×1)√hexagonal lattice,six reconstructed surface structures are observed:(2×2...Hg Te(111)surface is comprehensively studied by scanning tunneling microscopy/spectroscopy(STS).In addition to th√e prim√itive(1×1)√hexagonal lattice,six reconstructed surface structures are observed:(2×2),2×1,4×1,3×(1/2)3,2(1/2)2×2 and(1/2)11×2.The(2×2)reconstructed lattice maintains the primitive hexagonal symmetry,whi√le the lattices of the other five reconstructions are rectangular.Moreover,the topographic features of the3×(1/2)3 reconstruction are bias dependent,indicating that they have both topographic and electronic origins.The STSs obtained at different reconstructed surfaces show a universal dip feature with size~100 mV,which may be attributed to the surface distortion.Our results reveal the atomic structure and complex reconstructions of the cleaved Hg Te(111)surfaces,which paves the way to understand the rich properties of Hg Te crystal.展开更多
基金Supported by the National Key Research and Development Program of China under Grant Nos 2016YFA0301003 and 2016YFA0300403the National Natural Science Foundation of China under Grant Nos 11521404,11634009,U1632102,11504230,11674222,11574202,11674226,11574201 and U1632272
文摘Hg Te(111)surface is comprehensively studied by scanning tunneling microscopy/spectroscopy(STS).In addition to th√e prim√itive(1×1)√hexagonal lattice,six reconstructed surface structures are observed:(2×2),2×1,4×1,3×(1/2)3,2(1/2)2×2 and(1/2)11×2.The(2×2)reconstructed lattice maintains the primitive hexagonal symmetry,whi√le the lattices of the other five reconstructions are rectangular.Moreover,the topographic features of the3×(1/2)3 reconstruction are bias dependent,indicating that they have both topographic and electronic origins.The STSs obtained at different reconstructed surfaces show a universal dip feature with size~100 mV,which may be attributed to the surface distortion.Our results reveal the atomic structure and complex reconstructions of the cleaved Hg Te(111)surfaces,which paves the way to understand the rich properties of Hg Te crystal.
