Significant change of spin transport property in Cu/Nb bilayer due to superconducting transition.

摘要: The combination between the spin-dependent and super-conducting (SC) transports is expected to provide intriguing properties such as crossed Andreev reflection spin-triplet superconductivity. This may be able open a new avenue in field of spintronics, namely superconducting spintronics because superconductor itself has great potential for future nanoelectronic applications. To observe SC spin transports, suppression extrinsic effects originating from heating Oersted due electric current crucial role. Pure without accompanying charge known powerful mean preventing effects. However, non-negligible heat flow found exist even conventional pure device based on laterally-configured valve around injector. Here, we develop nanopillar-based lateral valve, which significantly reduces generation, Nb film. By using this ideal platform, that absorption strongly suppressed by transition Nb. demonstration clear evidence an insulator current.