Abstract：
:Synchrotron radiation core-level photoemission spectroscopy, scanning tunneling microscopy (STM), and first-principles calculations have been utilized to explore the growth processes and the atomic structure of the resulting films during the two-step molecular beam epitaxy (MBE) of In and Bi on the Si(111) surface. Deposition of 1.0-ML Bi on the In/Si(111)-(4 × 1) surface at room temperature results in Bi-terminated BiIn-(4 × 3) structures, which are stable up to ~300 °C annealing. By contrast, deposition of In on the β-Bi/Si(111)-(√3 × √3) surface at room temperature results in three dimensional (3D) In islands. In both cases, annealing at 460 °C results in the same In-terminated In0.75Bi/Si(111)-(2 × 2) surface. Our DFT calculations confirm that the surface energy of In-terminated In0.75Bi/Si(111)-(2 × 2) system is lower than that of Bi-terminated Bi0.75In/Si(111)-(2 × 2). These findings provide means for the control of the polarity of the MBE In-Bi atomically thick films.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Lin CY,Hsu CH,Huang YZ,Hsieh SC,Chen HD,Huang L,Huang ZQ,Chuang FC,Lin DSdoi
10.1038/s41598-018-37051-2subject
Has Abstractpub_date
2019-01-24 00:00:00pages
756issue
1issn
2045-2322pii
10.1038/s41598-018-37051-2journal_volume
9pub_type
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