First-principles calculations and bias-dependent STM measurements at the alpha-Sn/Ge(111) surface: a clear indication for the 1U2D configuration

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dc.creatorGori, P.
dc.creatorRonci, F.
dc.creatorColonna, S.
dc.creatorCricenti, A.
dc.creatorPulci, O.
dc.creatorLay, G. Le
dc.date2008-04-02
dc.date.accessioned2026-07-07T09:29:53Z
dc.date.available2026-07-07T09:29:53Z
dc.descriptionThe nature of the alpha-Sn/Ge(111) surface is still a matter of debate. In particular, two possible configurations have been proposed for the 3x3 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). By means of first-principles quasiparticle calculations we could simulate STM images as a function of bias voltage and compare them with STM experimental results at 78K, obtaining an unambiguous indication 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.
dc.descriptionSubmitted to PRL
dc.identifierhttps://arxiv.org/abs/0804.0386
dc.identifierhttp://arxiv.org/abs/0804.0386
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157954
dc.subjectMaterials Science
dc.titleFirst-principles calculations and bias-dependent STM measurements at the alpha-Sn/Ge(111) surface: a clear indication for the 1U2D configuration
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