Multiband model for tunneling in MgB2 junctions

Alexander Brinkman; Alexandre Avraamovitch Golubov; Horst Rogalla; O.V. Dolgov; J. Kortus; Y. Kong; O. Jepsen; O.K. Andersen

doi:10.1103/PhysRevB.65.180517

Multiband model for tunneling in MgB2 junctions

Alexander Brinkman, Alexandre Avraamovitch Golubov, Horst Rogalla, O.V. Dolgov, J. Kortus, Y. Kong, O. Jepsen, O.K. Andersen

Faculty of Science and Technology

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

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Abstract

A theoretical model for quasiparticle and Josephson tunneling in multiband superconductors is developed and applied to MgB2-based junctions. The gap functions in different bands in MgB2 are obtained from an extended Eliashberg formalism, using the results of band structure calculations. The temperature and angle dependencies of MgB2 tunneling spectra and the Josephson critical current are calculated. The conditions for observing one or two gaps are given. We argue that the model may help to settle the current debate concerning two-band superconductivity in MgB2.

Original language	Undefined
Pages (from-to)	180517/1-180517/4
Number of pages	4
Journal	Physical review B: Condensed matter and materials physics
Volume	65
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.65.180517
Publication status	Published - 2002

Keywords

METIS-206828
IR-43534

Access to Document

10.1103/PhysRevB.65.180517

multiband

Cite this

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T1 - Multiband model for tunneling in MgB2 junctions

AU - Brinkman, Alexander

AU - Golubov, Alexandre Avraamovitch

AU - Rogalla, Horst

AU - Dolgov, O.V.

AU - Kortus, J.

AU - Kong, Y.

AU - Jepsen, O.

AU - Andersen, O.K.

PY - 2002

Y1 - 2002

N2 - A theoretical model for quasiparticle and Josephson tunneling in multiband superconductors is developed and applied to MgB2-based junctions. The gap functions in different bands in MgB2 are obtained from an extended Eliashberg formalism, using the results of band structure calculations. The temperature and angle dependencies of MgB2 tunneling spectra and the Josephson critical current are calculated. The conditions for observing one or two gaps are given. We argue that the model may help to settle the current debate concerning two-band superconductivity in MgB2.

AB - A theoretical model for quasiparticle and Josephson tunneling in multiband superconductors is developed and applied to MgB2-based junctions. The gap functions in different bands in MgB2 are obtained from an extended Eliashberg formalism, using the results of band structure calculations. The temperature and angle dependencies of MgB2 tunneling spectra and the Josephson critical current are calculated. The conditions for observing one or two gaps are given. We argue that the model may help to settle the current debate concerning two-band superconductivity in MgB2.

KW - METIS-206828

KW - IR-43534

U2 - 10.1103/PhysRevB.65.180517

DO - 10.1103/PhysRevB.65.180517

M3 - Article

VL - 65

SP - 180517/1-180517/4

JO - Physical review B: Condensed matter and materials physics

JF - Physical review B: Condensed matter and materials physics

SN - 1098-0121

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