Artificially ordered Bi/Sb superlattice alloys: Fabrication and transport properties

[摘要] We hake fabricated Bi/Sb superlattice alloys that are artificially ordered on the atomic scale using molecular-beam epitaxy. We observe that by changing the superlattice period thickness. the electronic structure can be tuned from a semimetal, through zero gap, to a narrow-gap semiconductor, These unique properties, which are distinct from those in random alloys. are believed to be a consequence of ordered atomic configurations.

[关键词] MOBILITY SPECTRUM ANALYSIS;BISMUTH NANOWIRE ARRAYS;THIN-FILMS;MAGNETOTRANSPORT PROPERTIES;HALL CHARACTERIZATION;BI;TRANSITIONS;DEPOSITION