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A new type of Andreev reflection

XinCheng Xie  
【摘要】:正Andreev reflection (AR) [1] refers to a peculiar quasiparticle reflection process that takes place at the interface between a normal metal and a superconductor.Specifically,an electron impinging from the normal metal is reflected back as a hole,which effectively describes that two electrons in the normal metal penetrate into the superconductor and form a Cooper pair.AR dominates the electron transport below the superconducting gap in the superconductor junctions,which is an important experimental approach for the detection of various properties of electronic systems,such as the pairing symmetry of the unconventional superconductors,the spin polarization of the itinerant electrons and most recently,Majorana zero mode in topological systems.

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