Tunneling Images of Gallium on a Silicon Surface: Reconstructions, Superlattices, and Incommensuration | Zendy

D. M. Chen | Zendy; J. A. Golovchenko | Zendy; P. Bedrossian | Zendy; Kell Mortensen | Zendy

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Tunneling Images of Gallium on a Silicon Surface: Reconstructions, Superlattices, and Incommensuration

Author(s) -

D. M. Chen,

J. A. Golovchenko,

P. Bedrossian,

Kell Mortensen

Publication year - 1988

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.61.2867

Subject(s) - superlattice , silicon , gallium , condensed matter physics , scanning tunneling microscope , materials science , quantum tunnelling , monolayer , reflection (computer programming) , electron diffraction , gallium antimonide , surface reconstruction , lattice (music) , diffraction , optics , surface (topology) , nanotechnology , physics , optoelectronics , geometry , mathematics , metallurgy , computer science , acoustics , programming language

Real-space images of an incommensurate superlattice on a monolayer-gallium-covered silicon (111) surface have been obtained with the tunneling microscope. Large, internally ordered supercells which in turn form a lattice with discrete boundaries are observed. A graphitelike silicon-gallium top layer is suggested that is weakly bonded to the lattice below and stabilized by a periodic array of misfit dislocations. This model unifies reflection high-energy electron diffraction, x-ray standing-wave, and tunneling observations.

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