Coupled pb chains on si(557): origin of one-dimensional conductance.
The Pb/Si(557) system exhibits a strong anisotropy in conductance below 78 K, with the evolution of a characteristic chain structure. Here we show, using angle-resolved photoemission, that chain ordering results in complete Fermi-like nesting in the direction normal to the chains; in addition, the domain structure along the chains forms split-off valence bands with mesoscopic Fermi wavelengths which induce the 1D conductance without further instabilities at low temperatures.
Tegenkamp
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Institut für Festkörperphysik, Leibniz-Universität Hannover, 30167 Hannover, Germany.
Ohta
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McChesney
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JL
Dil
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Rotenberg
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Pfnür
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Horn
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