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Proximity-Induced Superconductivity in a Ferromagnetic Semiconductor (In,Fe)As

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, , Citation Taketomo Nakamura et al 2018 J. Phys.: Conf. Ser. 969 012036 DOI 10.1088/1742-6596/969/1/012036

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taketomo@issp.u-tokyo.ac.jp

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1 Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan

2 Department of Electrical Engineering and Information Systems, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

3 Center for Spintronics Research Network, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

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1742-6596/969/1/012036

Abstract

We observed supercurrent through an n-type ferromagnetic semiconductor (In,Fe)As. For the purpose we prepared S/F/S (S: superconductor, F: ferromagnet) junctions, which exhibited zero resistance up to 1 µm of junction width with critical current over 1 µA below 1 K. The long reach of the superconducting proximity effect suggests that the induced superconductivity is brought about by spin-triplet paring in (In,Fe)As.

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10.1088/1742-6596/969/1/012036