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Evidence for one-dimensional electron propagation on Si(111)-(2x1) from Coulomb blockade

Garleff, J. K.; Wenderoth, M.; Ulbrich, R. G.; Sürgers, C. 1; Löhneysen, H. v. 1
1 Center for Functional Nanostructures (CFN), Karlsruher Institut für Technologie (KIT)


Scanning tunneling spectroscopy is used to study the electronic properties of the Si(111)-2×1 surface at 8 K. Wave-function mapping reveals highly anisotropic scattering of electrons with one-dimensional (1D) confinement on the π-bonded chains. The differential tunneling conductance is strongly reduced at the Fermi energy EF and exhibits a Coulomb gap. The gap width W scales with the inverse length L of the chain segments defined by the distance between two adjacent scatterers such as surface steps or dopant atoms within a given chain. A model of electronic transport through 1D chain segments of finite length describes the observed behavior.

DOI: 10.1103/PhysRevB.72.073406
Zitationen: 14
Web of Science
Zitationen: 14
Zitationen: 14
Zugehörige Institution(en) am KIT Institut für Festkörperphysik (IFP)
Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2005
Sprache Englisch
Identifikator ISSN: 0163-1829, 0556-2805, 1094-1622, 1095-3795, 1098-0121, 1550-235X, 2469-9950, 2469-9969
KITopen-ID: 1000013575
HGF-Programm 52.01.01 (POF I, LK 01) Elektr.Eigenschaften.Magnetismus u.SL
Erschienen in Physical review / B
Verlag American Physical Society (APS)
Band 72
Heft 7
Seiten Art.Nr. 073406
Nachgewiesen in Web of Science
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