First-principles calculations and bias-dependent STM measurements at the a -Sn/Ge(111) surface (Articolo in rivista)

Type
Label
  • First-principles calculations and bias-dependent STM measurements at the a -Sn/Ge(111) surface (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1209/0295-5075/85/66001 (literal)
Alternative label
  • Gori P.1,2; Ronci F.1; Colonna S.1; Cricenti A.1,2,3; Pulci O.2,4;, Le Lay G.5,6 (2009)
    First-principles calculations and bias-dependent STM measurements at the a -Sn/Ge(111) surface
    in Europhysics letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gori P.1,2; Ronci F.1; Colonna S.1; Cricenti A.1,2,3; Pulci O.2,4;, Le Lay G.5,6 (literal)
Pagina inizio
  • 66001 (literal)
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  • 85 (literal)
Rivista
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  • doi: 10.1209/0295-5075/85/66001 (literal)
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  • 6 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 ISM CNR - Via del Fosso del Cavaliere 100, I-00133 Roma, Italy, EU; 2 NAST Centre - Via della Ricerca Scientifica 1, I-00133 Roma, Italy, EU; 3 Department of Physics and Astronomy, Vanderbilt University - Nashville, TN 37235-1807, USA; 4 ETSF, INFM-CNR Dipartimento di Fisica, Università di Roma “Tor Vergata”, Via della Ricerca Scientifica 1, I-00133 Roma, Italy, EU; 5 CINaM-CNRS, Campus de Luminy - Case 913, F-13288 Marseille Cedex 09, France, EU; 6 UFR Sciences de la Matière, Université de Provence - Marseille, France, EU (literal)
Titolo
  • First-principles calculations and bias-dependent STM measurements at the a -Sn/Ge(111) surface (literal)
Abstract
  • The nature of the alpha -Sn/Ge(111) surface is still a matter of debate. In particular, two possible configurations have been proposed for the 3× 3 ground state of this surface: one with two Sn adatoms in a lower position with respect to the third one (1U2D) and the other with opposite configuration (2U1D). We report ab initio GW calculations for the alpha-Sn/Ge(111) system, simulating STM images as a function of bias voltage and comparing them with STM experimental results at 78 K. The concurrent application of theory and experiments and the very good match between their results provide unambiguous indications that the stable configuration for the alpha-Sn/Ge(111) surface is the 1U2D. The possible inequivalence of the two down Sn adatoms is also discussed. (literal)
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