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Alexander A. Demkov
Researcher at University of Texas at Austin
Publications - 342
Citations - 8993
Alexander A. Demkov is an academic researcher from University of Texas at Austin. The author has contributed to research in topics: Thin film & Molecular beam epitaxy. The author has an hindex of 47, co-authored 331 publications receiving 7926 citations. Previous affiliations of Alexander A. Demkov include Freescale Semiconductor & Arizona State University.
Papers
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Journal ArticleDOI
A silicon-based photocathode for water reduction with an epitaxial SrTiO3 protection layer and a nanostructured catalyst
Li Ji,Martin D. McDaniel,Shijun Wang,Agham-Bayan S Posadas,Xiaohan Li,Haiyu Huang,Jack C. Lee,Alexander A. Demkov,Allen J. Bard,John G. Ekerdt,Edward T. Yu +10 more
TL;DR: It is shown that a silicon-based photocathode with a capping epitaxial oxide layer can provide efficient and stable hydrogen production from water and be highly dependent on the size and spacing of the structured metal catalyst.
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Electronic structure approach for complex silicas.
TL;DR: In this article, a theoretical electronic structure based approach suitable for the study of complex silicas, and apply it to three different silica polymorphs, was developed. But the method is first principles but simplified to cope with large systems.
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Large Pockels effect in micro- and nanostructured barium titanate integrated on silicon
Stefan Abel,Felix Eltes,J. Elliott Ortmann,Andreas Messner,P. Castéra,Tino Wagner,Darius Urbonas,Alvaro Rosa,A. M. Gutierrez,Domenico Tulli,Ping Ma,Benedikt Baeuerle,Arne Josten,Wolfgang Heni,Daniele Caimi,Lukas Czornomaz,Alexander A. Demkov,Juerg Leuthold,Pablo Sanchis,Jean Fompeyrine +19 more
TL;DR: It is proved that the Pockels effect remains strong even in nanoscale devices, and shown as a practical example data modulation up to 50 Gbit s−1.
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Further developments in the local-orbital density-functional-theory tight-binding method
James P. Lewis,Kurt R. Glaesemann,Gregory A. Voth,Jürgen Fritsch,Alexander A. Demkov,José Ortega,Otto F. Sankey +6 more
TL;DR: In this paper, Sankey and Niklewskii improved the Sankey-Niklewaki method by using the separable pseudopotential (Hamann or Troullier) and allowing double numerical basis sets with the addition of polarization orbitals and d orbitals.
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Switching of ferroelectric polarization in epitaxial BaTiO3 films on silicon without a conducting bottom electrode
Catherine Dubourdieu,John Bruley,Thomas M. Arruda,Agham Posadas,Jean Jordan-Sweet,Martin M. Frank,Eduard A. Cartier,David J. Frank,Sergei V. Kalinin,Alexander A. Demkov,Vijay Narayanan +10 more
TL;DR: Ferroelectric switching of 8- to 40-nm-thick BaTiO₃ films in metal-ferroelectric-semiconductor structures is realized, and field-effect devices using this epitaxial oxide stack can be envisaged.