C 60 -induced reconstruction of the Ge(111) surface
1994; American Physical Society; Volume: 50; Issue: 12 Linguagem: Inglês
10.1103/physrevb.50.8454
ISSN1095-3795
AutoresHang Xu, D. M. Chen, W. N. Creager,
Tópico(s)Boron and Carbon Nanomaterials Research
ResumoWe report a direct observation of surface reconstruction induced by the adsorption of ${\mathrm{C}}_{60}$ molecules. At submonolayer and full monolayer coverage of ${\mathrm{C}}_{60}$ on Ge(111), two surface phases (3 \ensuremath{\surd}3 \ifmmode\times\else\texttimes\fi{}3 \ensuremath{\surd}3 R30\ifmmode^\circ\else\textdegree\fi{} and \ensuremath{\surd}13 \ifmmode\times\else\texttimes\fi{} \ensuremath{\surd}13 R14\ifmmode^\circ\else\textdegree\fi{}) as well as a localized metastable 5\ifmmode\times\else\texttimes\fi{}5 phase are identified by low-energy electron diffraction and scanning tunneling microscopy. The formation of the two phases is facilitated by induced reconstructions of the Ge surface into different surface structures. Models for these surface structures are proposed that elucidate the close interplay between the adsorbed ${\mathrm{C}}_{60}$ molecules and the host Ge surface.
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