Physics – Condensed Matter – Superconductivity
Scientific paper
2001-10-09
Physics
Condensed Matter
Superconductivity
10 pages, 5 figures, to be published in Phys. Rev. Lett
Scientific paper
Resonant transport is demonstrated in a hybrid superconductor-semiconductor heterostructure junction grown by molecular beam epitaxy on GaAs. This heterostructure realizes the model system introduced by de Gennes and Saint-James in 1963 [P. G. de Gennes and D. Saint-James, Phys. Lett. {\bf 4}, 151 (1963)]. At low temperatures a single marked resonance peak is shown superimposed to the characteristic Andreev-dominated subgap conductance. The observed magnetotransport properties are successfully analyzed within the random matrix theory of quantum transport, and ballistic effects are included by directly solving the Bogoliubov-de Gennes equations.
Beltram Fabio
Franciosi Alfonso
Giazotto Francesco
Lazzarino Marco
Orani Daniela
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