open access

https://hdl.handle.net/2115/82357

Strong anomalous proximity effect from spin-singlet superconductors

英語

2021-07-08

American Physical Society (APS)

Physical Review B

104(2)

L020502

The proximity effect from a spin-triplet p(x)-wave superconductor to a dirty normal-metal has been shown to result in various unusual electromagnetic properties, reflecting a cooperative relation between topologically protected zero-energy quasiparticles and odd-frequency Cooper pairs. However, because of a lack of candidate materials for spin-triplet p(x)-wave superconductors, observing this effect has been difficult. In this paper, we demonstrate that the anomalous proximity effect, which is essentially equivalent to that of a spin-triplet p(x)-wave superconductor, can occur in a semiconductor/high-T-c cuprate superconductor hybrid device in which two potentials coexist: A spin-singlet d-wave pair potential and a spin-orbit coupling potential sustaining the persistent spin-helix state. As a result, we propose an alternative and promising route to observe the anomalous proximity effect related to the profound nature of topologically protected quasiparticles and odd-frequency Cooper pairs.

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Copyright (2021) by The American Physical Society.

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