Evidence for a diamondlike electronic band structure of Si multilayers on Ag(111)

Article

关键词: SURFACE-STATE;    SILICENE;   

DOI  :  10.1103/PhysRevB.92.245127

来源: SCIE

【 摘 要 】

Silicon multilayers on Ag(111) have been suggested to exhibit the structure of silicene, a material that has been heralded as a novel basis for microelectronic applications. However, our angle-resolved photoemission spectra (ARPES) from silicon multilayers on Ag(111) and of the silver-induced reconstruction of Si(111) demonstrate, from the close match in the valence level band structures, that the films exhibit a sp(3) diamondlike structure. This refutes the interpretation of silicon multilayers on Ag(111) as silicene, a conclusion that is strengthened by the observation from core level photoemission that significant silver segregation occurs to the surface of these layers.

【 授权许可】

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