- INST PURE APPLIED PHYSICS
We studied how Si6Hx clusters behave on Si (111)-(7 x 7) surfaces depending on hydrogen content x by scanning tunneling microscopy. The Si6Hx+ ions were synthesized in an ion trap and deposited onto the (7 x 7) surfaces with an impact kinetic energy of 3 eV, i.e., 0.5 eV/Si atom, without decomposition. Deposited Si6H10-13 clusters favorably adsorbed on faulted halves of the (7 x 7) surfaces while Si6H0-5 clusters were randomly distributed. A clear difference of the electronic structure between Si6H0-5 and Si6H10-13 clusters was found in the tunneling spectra of the clusters.
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