Localized Electron States Near a Metal-SemiconductorNanocontact

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The electronic structure of nanowires in contact withmetallic electrodes of experimentally relevant sizes is calculated byincorporating the electrostatic polarization potential into the atomisticsingle particle Schrodinger equation. We show that the presence of anelectrode produces localized electron/hole states near the electrode, aphenomenon only exhibited in nanostructures and overlooked in the past.This phenomenon will have profound implications on electron transport insuch nanosystems. We calculate several electrode/nanowire geometries,with varying contact depths and nanowire radii. We demonstrate the changein the band gap of up to 0.5 eV in 3 nm diameter CdSe nanowires andcalculate the magnitude of the applied electric field necessary toovercome the ... continued below

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Demchenko, Denis O. & Wang, Lin-Wang April 25, 2007.

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The electronic structure of nanowires in contact withmetallic electrodes of experimentally relevant sizes is calculated byincorporating the electrostatic polarization potential into the atomisticsingle particle Schrodinger equation. We show that the presence of anelectrode produces localized electron/hole states near the electrode, aphenomenon only exhibited in nanostructures and overlooked in the past.This phenomenon will have profound implications on electron transport insuch nanosystems. We calculate several electrode/nanowire geometries,with varying contact depths and nanowire radii. We demonstrate the changein the band gap of up to 0.5 eV in 3 nm diameter CdSe nanowires andcalculate the magnitude of the applied electric field necessary toovercome the localization.

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  • Journal Name: Nano Letters; Journal Volume: 7; Journal Issue: 10; Related Information: Journal Publication Date: 2007

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  • Report No.: LBNL--62609
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1021/nl072027n | External Link
  • Office of Scientific & Technical Information Report Number: 923656
  • Archival Resource Key: ark:/67531/metadc899009

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  • April 25, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 31, 2016, 3:51 p.m.

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Demchenko, Denis O. & Wang, Lin-Wang. Localized Electron States Near a Metal-SemiconductorNanocontact, article, April 25, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc899009/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.