2010
DOI: 10.1103/physrevb.82.205413
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Pb nanowires on vicinal Si(111) surfaces: Effects of refacetting on transport

Abstract: The conductance of Pb wires grown by self-assembly on Si͑557͒ has been studied in detail as a function of coverage and of the facet structure. Only for 1.31 ML, corresponding to one physical monolayer on the terraces ͑steps not covered with Pb͒, and a perfectly ordered wire array along the ͓112͔ direction quasi-onedimensional ͑1D͒ transport along the ͓110͔ direction is found, corroborating the model of one-dimensional band filling in an adsorbate induced ͑223͒ facet structure. The transport results recently sh… Show more

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Cited by 20 publications
(12 citation statements)
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“…Details about the fabrication of the contacts and the in situ cleaning procedures of the Si samples are described elsewhere. 7,17 Bi has been evaporated out of a ceramic crucible, while Tb has been evaporated by direct current heating of a tantalum stripe to which a small piece of pure Tb has been attached by spot welding. The quality and crystallinity of the Si surface and Bi films have been checked by low-energy electron diffraction (LEED).…”
Section: Methodsmentioning
confidence: 99%
“…Details about the fabrication of the contacts and the in situ cleaning procedures of the Si samples are described elsewhere. 7,17 Bi has been evaporated out of a ceramic crucible, while Tb has been evaporated by direct current heating of a tantalum stripe to which a small piece of pure Tb has been attached by spot welding. The quality and crystallinity of the Si surface and Bi films have been checked by low-energy electron diffraction (LEED).…”
Section: Methodsmentioning
confidence: 99%
“…At that temperature the system switched from low-to high-conductance anisotropy with a semiconductor-insulator transition. This effect is very sensitive to Pb concentration as well as surface inhomogeneities and is connected with a refacetting structural transition together with electron localization and spin-orbit couplings [23]. A metal-insulator transition was also observed in photoemission spectroscopy (PES) experiments for 1D Au chains on Si(553) as well as for Si(557) [24,25].…”
Section: Introductionmentioning
confidence: 87%
“…A particularly interesting example of one-dimensional structures on anisotropic crystals are Pb chains on Si(557) surface where a phase transition was observed at a critical temperature 78 K for optimal Pb coverage 1.31 ML [22,23]. At that temperature the system switched from low-to high-conductance anisotropy with a semiconductor-insulator transition.…”
Section: Introductionmentioning
confidence: 99%
“…A metallic band structure has been revealed in GdSi 2 nanowires,39 while a fluctuating charge order has also been reported in YSi 2 nanowires at low temperatures 40. Four‐probe STM provides the first real opportunity to explore the direct correlation between electronic transport and local electronic and structural properties down to the atomic scale, despite several early attempts with other techniques at macro‐ to mesoscopic length scale 41…”
Section: Electronic Transport In Quantum Wiresmentioning
confidence: 99%