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          Institute: Fritz-Haber-Institut     Collection: Theory     Display Documents



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ID: 432289.0, Fritz-Haber-Institut / Theory
Controlling polarization at insulating surfaces: Quasiparticle calculations for molecules adsorbed on insulator films
Authors:Freysoldt, Christoph; Rinke, Patrick; Scheffler, Matthias
Language:English
Date of Publication (YYYY-MM-DD):2009-07-31
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys. Rev. Lett.
Volume:103
Issue / Number:5
Start Page:056803-1
End Page:056803-4
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:By means of quasiparticle-energy calculations in the G0W0 approach, we show for the prototypical insulator-semiconductor system NaCl=Ge(001) that polarization effects at the interfaces noticeably affect the excitation spectrum of molecules adsorbed on the surface of the NaCl films. The magnitude of the effect can be controlled by varying the thickness of the film, offering new opportunities for tuning electronic excitations in, e.g., molecular electronics or quantum transport. Polarization effects are visible even for the excitation spectrum of the NaCl films themselves, which has important implications for the interpretation of surface science experiments for the characterization of insulator surfaces.
External Publication Status:published
Document Type:Article
Communicated by:Matthias Scheffler
Affiliations:Fritz-Haber-Institut/Theory
External Affiliations:Materials Department, University of California, Santa Barbara, CA 93106, USA
Identifiers:URL:http://dx.doi.org/10.1103/PhysRevLett.103.056803 [Open Access]
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