Influence of the impurity scattering on charge transport in unconventional superconductor junctions

B. Lu; P. Burset; Y. Tanuma; Alexandre Avraamovitch Golubov; Y. Asano; Y. Tanaka

doi:10.1103/PhysRevB.94.014504

Influence of the impurity scattering on charge transport in unconventional superconductor junctions

B. Lu, P. Burset, Y. Tanuma, Alexandre Avraamovitch Golubov, Y. Asano, Y. Tanaka

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Abstract

We study the influence of nonmagnetic impurity scatterings on the tunneling conductance of a junction consisting of a normal metal and a disordered unconventional superconductor by solving the quasiclassical Eilenberger equation self-consistently. We find that the impurity scatterings in both the Born and the unitary limits affect the formation of the Andreev bound states and modify strongly the tunneling spectra around zero bias. Our results are interpreted well by the appearance of odd-frequency Cooper pairs near the interface and by the divergent behavior of the impurity self-energy. The present paper provides a useful tool to identify the pairing symmetry of unconventional superconductors in experiments.

Original language	English
Article number	014504
Pages (from-to)	-
Number of pages	9
Journal	Physical review B: Condensed matter and materials physics
Volume	94
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.94.014504
Publication status	Published - 2016

Keywords

METIS-320367
IR-103870

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abstract = "We study the influence of nonmagnetic impurity scatterings on the tunneling conductance of a junction consisting of a normal metal and a disordered unconventional superconductor by solving the quasiclassical Eilenberger equation self-consistently. We find that the impurity scatterings in both the Born and the unitary limits affect the formation of the Andreev bound states and modify strongly the tunneling spectra around zero bias. Our results are interpreted well by the appearance of odd-frequency Cooper pairs near the interface and by the divergent behavior of the impurity self-energy. The present paper provides a useful tool to identify the pairing symmetry of unconventional superconductors in experiments.",

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AU - Lu, B.

AU - Burset, P.

AU - Tanuma, Y.

AU - Golubov, Alexandre Avraamovitch

AU - Asano, Y.

AU - Tanaka, Y.

PY - 2016

Y1 - 2016

N2 - We study the influence of nonmagnetic impurity scatterings on the tunneling conductance of a junction consisting of a normal metal and a disordered unconventional superconductor by solving the quasiclassical Eilenberger equation self-consistently. We find that the impurity scatterings in both the Born and the unitary limits affect the formation of the Andreev bound states and modify strongly the tunneling spectra around zero bias. Our results are interpreted well by the appearance of odd-frequency Cooper pairs near the interface and by the divergent behavior of the impurity self-energy. The present paper provides a useful tool to identify the pairing symmetry of unconventional superconductors in experiments.

AB - We study the influence of nonmagnetic impurity scatterings on the tunneling conductance of a junction consisting of a normal metal and a disordered unconventional superconductor by solving the quasiclassical Eilenberger equation self-consistently. We find that the impurity scatterings in both the Born and the unitary limits affect the formation of the Andreev bound states and modify strongly the tunneling spectra around zero bias. Our results are interpreted well by the appearance of odd-frequency Cooper pairs near the interface and by the divergent behavior of the impurity self-energy. The present paper provides a useful tool to identify the pairing symmetry of unconventional superconductors in experiments.

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