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

Löhneysen, H. von; Garleff, J. K.; Wenderoth, M.; Ulbrich, R. G.; Sürgers, C.

Abstract:
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.


Zugehörige Institution(en) am KIT Institut für Festkörperphysik (IFP)
Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2005
Sprache Englisch
Identifikator ISSN: 0163-1829
KITopen ID: 1000013575
HGF-Programm 52.01.01; LK 01
Erschienen in Physical Review B
Band 72
Heft 7
Seiten 073406/1 - 4
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