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  Influence of Na adsorption on the quantum conductance and metal-insulator transition of the In-Si(111)(4 x 1)-(8 x 2) nanowire array

Schmidt, W. G., Babilon, M., Thierfelder, C., Sanna, S., & Wippermann, S. M. (2011). Influence of Na adsorption on the quantum conductance and metal-insulator transition of the In-Si(111)(4 x 1)-(8 x 2) nanowire array. Physical Review B, 84(11): 115416. doi:10.1103/PhysRevB.84.115416.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-7806-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-7807-8
Genre: Journal Article

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 Creators:
Schmidt, Wolf Gero1, Author              
Babilon, M.1, Author              
Thierfelder, Christian2, Author              
Sanna, Simone3, Author              
Wippermann, Stefan Martin3, Author              
Affiliations:
1Lehrstuhl für Theoretische Physik, Universität Paderborn, 33095 Paderborn, Germany, ou_persistent22              
2Lehrstuhl für Theoretische Physik, Universität Paderborn, D-33095 Paderborn, Germany, ou_persistent22              
3Department of Theoretical Physics, Paderborn University, 33095 Paderborn, Germany, ou_persistent22              

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 Abstract: Density functional theory calculations are performed to study the influence of Na adatoms on the electron transport and structural properties of the In-Si(111)(4 x 1)-(8 x 2) nanowire array. It is found that there are several energetically nearly degenerate Na adsorption sites, the precise energetic ordering of which depends on the surface coverage. Irrespective of the adsorption site, the adatoms show mainly a repulsive interaction with little indications for long-range correlation. The calculations show only a moderate disturbance of the quantum conductance of the metallic room-temperature (4 x 1) In nanowire phase upon Na adsorption. Also, the electronic density of states at the Fermi energy is only slightly modified. However, it is found that adsorption-induced strain as well as charge donation into the In nanowires lead to a noticeable decrease of the metal-insulator transition temperature. Therefore, Na adsorption on the semiconducting (8 x 2) In nanowire phase may trigger a transition into the metallic state.

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Language(s): eng - English
 Dates: 2011-09-14
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 84 (11) Sequence Number: 115416 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008