Direct penetration of spin-triplet superconductivity into a ferromagnet in Au/SrRuO3/Sr2 RuO4 junctions

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Title
Direct penetration of spin-triplet superconductivity into a ferromagnet in Au/SrRuO3/Sr2 RuO4 junctions
Author(s)
Anwar M.S.; Seung Ran Lee; Ishiguro R.; Sugimoto Y.; Tano Y.; Sung Jin Kang; Yeong Jae Shin; Yonezawa S.; Manske D.; Takayanagi H.; Taewon Noh; Maeno Y.
Publication Date
2016-10
Journal
NATURE COMMUNICATIONS, v.7, no., pp.13220 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Efforts have been ongoing to establish superconducting spintronics utilizing ferromagnet/inferconductor heterostructures. Previously reported devices are based on spin-singlet superconductors (SSCs), where the spin degree of freedom is lost. Spin-polarized supercurrent induction in ferromagnetic metals (FMs) is achieved even with SSCs, but only with the aid of interfacial complex magnetic structures, which severely affect information imprinted to the electron spin. Use of spin-triplet superconductors (TSCs) with spin-polarizable Cooper pairs potentially overcomes this difficulty and further leads to novel functionalities. Here, we report spin-triplet superconductivity induction into a FM SrRuO3 from a leading TSC candidate Sr2 RuO4, by fabricating microscopic devices using an epitaxial SrRuO3/Sr2 RuO4 hybrid. The differential conductance, exhibiting Andreev-reflection features with multiple energy scales up to around half tesla, indicates the penetration of superconductivity over a considerable distance of 15 nm across the SrRuO3 layer without help of interfacial complex magnetism. This demonstrates potential utility of FM/TSC devices for superspintronics. © 2016 The Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/3048
ISSN
2041-1723
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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