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Anomalous proximity effect of a spin-singlet superconductor with a spin-orbit interaction
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abstract
The anomalous proximity effect of a spin-triplet $p$-wave superconductor has been known as a part of the Majorana physics and is explained by the penetration of zero-energy states from a surface of a superconductor to a dirty normal metal. We demonstrate that a spin-singlet $d$-wave superconductor without any surface zero-energy states exhibits the anomalous proximity effect in the presence of a specific spin-orbit interaction. The results show the quantization of the zero-bias conductance in a dirty normal-metal/superconductor junction. We also discuss a relation between our findings and results in an experiment on a CoSi$_2$/TiSi$_2$ junction.
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Cited by 1 Pith paper
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Majorana flat bands and anomalous proximity effects in $p$-wave magnet--superconductor hybrid systems
A two-dimensional hybrid of an s-wave superconductor and a p-wave magnet hosts chiral-symmetry-protected flat-band Majorana bound states and a disorder-robust quantized zero-bias conductance peak.
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