Magnon-assisted Andreev reflection in a ferromagnet-superconductor junction

E. McCann; V. I. Fal'ko

doi:10.1209/epl/i2001-00560-3

Magnon-assisted Andreev reflection in a ferromagnet-superconductor junction

E. McCann^*, V. I. Fal'ko

^*Corresponding author for this work

Lancaster University

Research output: Contribution to journal › Article › peer-review

Abstract

A new mechanism for inelastic Andreev reflection at a ferromagnetic metal-superconductor interface is proposed, which consists of the simultaneous injection of a Cooper pair from the superconductor and the emission of a magnon inside the ferromagnet. We find that this process generates an additional contribution to the subgap non-linear I(V) characteristics, which is asymmetric with respect to the sign of the bias voltage and is related to the density of states of magnons in the ferromagnet.

Original language	English
Pages (from-to)	583-589
Number of pages	7
Journal	Europhysics Letters
Volume	56
Issue number	4
DOIs	https://doi.org/10.1209/epl/i2001-00560-3
Publication status	Published - 11 Nov 2001

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National Graphene Institute

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abstract = "A new mechanism for inelastic Andreev reflection at a ferromagnetic metal-superconductor interface is proposed, which consists of the simultaneous injection of a Cooper pair from the superconductor and the emission of a magnon inside the ferromagnet. We find that this process generates an additional contribution to the subgap non-linear I(V) characteristics, which is asymmetric with respect to the sign of the bias voltage and is related to the density of states of magnons in the ferromagnet.",

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N2 - A new mechanism for inelastic Andreev reflection at a ferromagnetic metal-superconductor interface is proposed, which consists of the simultaneous injection of a Cooper pair from the superconductor and the emission of a magnon inside the ferromagnet. We find that this process generates an additional contribution to the subgap non-linear I(V) characteristics, which is asymmetric with respect to the sign of the bias voltage and is related to the density of states of magnons in the ferromagnet.

AB - A new mechanism for inelastic Andreev reflection at a ferromagnetic metal-superconductor interface is proposed, which consists of the simultaneous injection of a Cooper pair from the superconductor and the emission of a magnon inside the ferromagnet. We find that this process generates an additional contribution to the subgap non-linear I(V) characteristics, which is asymmetric with respect to the sign of the bias voltage and is related to the density of states of magnons in the ferromagnet.

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Magnon-assisted Andreev reflection in a ferromagnet-superconductor junction

Abstract

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