Schottky barrier at the AlN/metal junction

We report a first princples study of the Schottky barrier of zinc blende (zb) AlN to Pt, Au, Al, W, In, and Cs. We find good agreement with the Schottky model for Pt, Au, Al, W, and In contacts. However, in the case of Cs, a spatially extended interface dipole formation results in significant deviat...

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Bibliographic Details
Published inJournal of applied physics Vol. 113; no. 1
Main Authors Slepko, Alexander, Ramdani, Jamal, Demkov, Alexander A.
Format Journal Article
LanguageEnglish
Published 07.01.2013
Subjects
Aluminum
Aluminum nitride
Barriers
Blends
Deviation
Gold
Platinum
Zinc
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Summary:We report a first princples study of the Schottky barrier of zinc blende (zb) AlN to Pt, Au, Al, W, In, and Cs. We find good agreement with the Schottky model for Pt, Au, Al, W, and In contacts. However, in the case of Cs, a spatially extended interface dipole formation results in significant deviation from the Schottky rule. Moreover, for the “cesiated” AlN surface, the electron affinity shifts from positive 2.0 eV for clean AlN to negative 1.8 eV in qualitative agreement with recent experiments by Wu and Kahn [C. I. Wu and A. Kahn, Appl. Surf. Sci. 162, 250 (2000)].
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4772716