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- W2022044650 abstract "The evolution of ${mathrm{GaAs}}_{1ensuremath{-}x}{mathrm{N}}_{x}$ band structure at low nitrogen concentrations (up to $x=0.021)$ is studied by ballistic electron emission microscopy (BEEM) spectra of ${mathrm{A}mathrm{u}/mathrm{G}mathrm{a}mathrm{A}mathrm{s}}_{1ensuremath{-}x}{mathrm{N}}_{x}$ heterostructures. Two peaks observed in the second derivative BEEM spectra are identified with the contribution from the ensuremath{Gamma}- and L-like bands of ${mathrm{GaAs}}_{1ensuremath{-}x}{mathrm{N}}_{x}.$ As the nitrogen concentration increases, the energetic separation between these peaks increases, with a relative decrease of the L-like band contribution to the BEEM current. In addition, we found a strong decrease of the ${mathrm{A}mathrm{u}/mathrm{G}mathrm{a}mathrm{A}mathrm{s}}_{1ensuremath{-}x}{mathrm{N}}_{x}$ Schottky barrier with the nitrogen incorporation, from $ensuremath{sim}0.92 mathrm{eV}$ at $x=0$ down to $ensuremath{sim}0.55 mathrm{eV}$ at $x=0.021.$ The observed Schottky barrier reduction approximates the ${mathrm{GaAs}}_{1ensuremath{-}x}{mathrm{N}}_{x}$ band-gap reduction." @default.
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- W2022044650 date "2000-03-15" @default.
- W2022044650 modified "2023-10-14" @default.
- W2022044650 title "Evolution of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>GaAs</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>N</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>conduction states and giant<mml:math xmlns:mml=http://www.w3.org/1998/Math/…" @default.
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- W2022044650 doi "https://doi.org/10.1103/physrevb.61.r7861" @default.
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