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Article Dans Une Revue Physical Review B Année : 2018

Accurate ab initio determination of ballistic electron emission spectroscopy Application to Au/Ge

Résumé

Ab initio nonequilibrium Keldysh formalism based on an N-order renormalization technique is used to compute I (V) ballistic electron emission microscopy characteristics at the Au/Ge(001) interface. Such a formalism quantitatively reproduces precise experimental measurements under ultrahigh vacuum and low- temperature conditions. At T = 0 K, the ballistic current follows the law (V - V-SB)(2.1), V(SB )being the Schottky barrier. At T > 0 K, temperature effects become significant near the onset and must be taken into account to identify an accurate value for V-SB from a best-fit procedure. We find two values for V-SB, 0.67 and 0.75 eV, which we associate with two different atomic registries at the interface.
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Dates et versions

hal-01973596 , version 1 (14-01-2019)

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A. Gerbi, C. Gonzalez, R. Buzio, N. Manca, D. Marre, et al.. Accurate ab initio determination of ballistic electron emission spectroscopy Application to Au/Ge. Physical Review B, 2018, 98 (20), pp.205416. ⟨10.1103/PhysRevB.98.205416⟩. ⟨hal-01973596⟩
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