Comment on “Unified Formalism of Andreev Reflection at a Ferromagnet/Superconductor Interface”

Eschrig, Matthias; Golubov, A. A.; Mazin, I. I.; Nadgorny, B.; Tanaka, Yukio; Valls, Oriol T.; Žutić, Igor

doi:10.1103/physrevlett.111.139703

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…Andreev point contact spectra in S-F structures are modified with respect to those in S-N structures due to spin-filtering effects and the spin-sensitivity of Andreev scattering [99,[148][149][150][151][152][153][154]. Spin-dependent phase shifts also crucially affect Andreev point contact spectra [87,[155][156][157][158][159][160].…”

Section: Andreev Spectroscopy In F-s and F-s-f Structuresmentioning

confidence: 99%

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Theory of Andreev bound states in S-F-S junctions and S-F proximity devices

Eschrig¹

2018

Phil. Trans. R. Soc. A.

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Andreev bound states are an expression of quantum coherence between particles and holes in hybrid structures composed of superconducting and non-superconducting metallic parts. Their spectrum carries important information on the nature of the pairing, and determines the current in Josephson devices. Here, I focus on Andreev bound states in systems involving superconductors and ferromagnets with strong spin-polarization. I provide a general framework for non-local Andreev phenomena in such structures in terms of coherence functions, and show how the latter link wave function and Green-function based theories.This article is part of the theme issue 'Andreev bound states'.

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Section: Andreev Spectroscopy In F-s and F-s-f Structuresmentioning

confidence: 99%

Section: Andreev Spectroscopy In F-s and F-s-f' Structuresmentioning

confidence: 99%

Theory of Andreev bound states in S-F-S junctions and S-F proximity devices

Eschrig¹

2018

Phil. Trans. R. Soc. A.

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“…This is based on a partially polarized current, where the Andreev reflection is limited by minority states and the excess majority carriers provide an evanescent contribution. However, this model has also been called into doubt by Eschrig and co-workers 8 . In particular, they pointed out that the additional evanescent component is introduced in an ad-hoc manner, and that the resulting wavefunction violates charge conservation.…”

Section: Introductionmentioning

confidence: 99%

Phenomenology of Andreev reflection from first-principles transport theory

Narayan¹,

Rungger²,

Sanvito³

2014

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We study Andreev reflection in normal metal-superconductor junctions by using an extended Blonder-Tinkham-Klapwijk model combined with transport calculations based on density functional theory. Starting from a parameter-free description of the underlying electronic structure, we perform a detailed investigation of normal metal-superconductor junctions, as the separation between the superconductor and the normal metal is varied. The results are interpreted by means of transverse momentum resolved calculations, which allow us to examine the contributions arising from different regions of the Brillouin zone. Furthermore we investigate the effect of a voltage bias on the normal metal-superconductor conductance spectra. Finally, we consider Andreev reflection in carbon nanotubes sandwiched between normal and superconducting electrodes.

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“…After the publication of the paper by Chen, Tesanovic, and Chien [1] (hereafter noted as the CTC model) on the unified formalism of Andreev reflection, Eschrig et al [2] (hereafter noted as the Comment), assert that a number of works [2][3][4][5][6][7] have already solved the problem and that the CTC model violates basic physics. Both assertions are false.…”

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Reply to the Comment on "Unified Formulism of Andreev Reflection at a Ferromagnetic/Superconductor Interface" by Eschrig et al

Chen,

Chien

2013

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Comment on “Unified Formalism of Andreev Reflection at a Ferromagnet/Superconductor Interface”

Cited by 5 publications

References 12 publications

Theory of Andreev bound states in S-F-S junctions and S-F proximity devices

Theory of Andreev bound states in S-F-S junctions and S-F proximity devices

Phenomenology of Andreev reflection from first-principles transport theory

Reply to the Comment on "Unified Formulism of Andreev Reflection at a Ferromagnetic/Superconductor Interface" by Eschrig et al

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