Tegenkamp, C.; Kallassy, Z.; Pfnür, H.; Günter, H.-L.; Zielasek, V.; Henzler, M.: Switching between one and two dimensions: Conductivity of Pb-induced chain structures on Si(557). In: Physical Review Letters 95 (2005), Nr. 17, 176804. DOI:
https://doi.org/10.1103/PhysRevLett.95.176804
Zusammenfassung: |
We show in a combined study of four-point conductance measurement and tunneling microscopy that surface state conductance induced by one monolayer of Pb on Si(557) can be quasi one dimensional with conductivity values close to typical three-dimensional metals. At a critical temperature of Tc=78K, associated with an order-disorder phase transition and a tenfold superperiodicity along the Pb chains, the system switches from low to high conductance anisotropy, with a semiconductor-insulator transition in the direction perpendicular to the chain structure, while along the chains conductance with a (1/T+const) temperature dependence was found. © 2005 The American Physical Society.
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Lizenzbestimmungen: |
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Publikationstyp: |
Article |
Publikationsstatus: |
publishedVersion |
Erstveröffentlichung: |
2005 |
Schlagwörter (englisch): |
Conductance measurement, Pb-induced chain structures, Semiconductor-insulator transition, Anisotropy, Measurement theory, Molecular structure, Monolayers, Phase transitions, Electric conductance
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Fachliche Zuordnung (DDC): |
530 | Physik
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