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Andreev-Fano Effect in a Hybrid Normal-Metal / Superconductor Interferometer

Yu Zhu·Qing-feng Sun·Tsung-han Lin
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Abstract

We report on a new type of Fano effect, named as Andreev-Fano effect, in a hybrid normal-metal / superconductor (N/S) interferometer embedded with a quantum dot. Compared with the conventional Fano effect, Andreev-Fano effect has some new features related to the characteristics of Andreev reflection. In the linear response regime, the line shape is the square of the conventional Fano shape; while in the nonlinear transport, a sharp resonant structure is superposed on an expanded interference pattern, qualitatively different from the conventional Fano effect. The phase dependence of the hybrid N/S interferometer is also distinguished from those of all-N or all-S interferometers.

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Yu Zhu, Qing-feng Sun, Tsung-han Lin. 2002-09-19. Andreev-Fano Effect in a Hybrid Normal-Metal / Superconductor Interferometer. https://arxiv.org/abs/cond-mat/0209456

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