Theory of supercurrent transport in SIsFS Josephson junctions

S.V. Bakurskiy, N.V. Klenov, I.I. Soloviev, M..Y. Kupriyanov, Alexandre Avraamovitch Golubov

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Abstract

We present the results of a theoretical study of current-phase relations (CPRs) Js(φ) in Josephson junctions of SIsFS type, where S is a bulk superconductor and IsF is a complex weak link consisting of a superconducting film s, a metallic ferromagnet F, and an insulating barrier I. At temperatures close to critical, T≲Tc, calculations are performed analytically in the frame of the Ginsburg-Landau equations. At low temperatures a numerical method is developed to solve self-consistently the Usadel equations in the structure. We demonstrate that SIsFS junctions have several distinct regimes of supercurrent transport and we examine spatial distributions of the pair potential across the structure in different regimes. We study the crossover between these regimes, which is caused by shifting the location of a weak link from the tunnel barrier I to the F layer. We show that strong deviations of the CPR from sinusoidal shape occur even in the vicinity of Tc , and these deviations are strongest in the crossover regime. We demonstrate the existence of temperature-induced crossover between 0 and π states in the contact and show that the smoothness of this transition strongly depends on the CPR shape.
Original languageUndefined
Article number144519
Pages (from-to)144519-1-144519-13
Number of pages13
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume88
Issue number14
DOIs
Publication statusPublished - 2013

Keywords

  • METIS-301652
  • IR-88959

Cite this

Bakurskiy, S.V. ; Klenov, N.V. ; Soloviev, I.I. ; Kupriyanov, M..Y. ; Golubov, Alexandre Avraamovitch. / Theory of supercurrent transport in SIsFS Josephson junctions. In: Physical Review B (Condensed Matter and Materials Physics). 2013 ; Vol. 88, No. 14. pp. 144519-1-144519-13.
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title = "Theory of supercurrent transport in SIsFS Josephson junctions",
abstract = "We present the results of a theoretical study of current-phase relations (CPRs) Js(φ) in Josephson junctions of SIsFS type, where S is a bulk superconductor and IsF is a complex weak link consisting of a superconducting film s, a metallic ferromagnet F, and an insulating barrier I. At temperatures close to critical, T≲Tc, calculations are performed analytically in the frame of the Ginsburg-Landau equations. At low temperatures a numerical method is developed to solve self-consistently the Usadel equations in the structure. We demonstrate that SIsFS junctions have several distinct regimes of supercurrent transport and we examine spatial distributions of the pair potential across the structure in different regimes. We study the crossover between these regimes, which is caused by shifting the location of a weak link from the tunnel barrier I to the F layer. We show that strong deviations of the CPR from sinusoidal shape occur even in the vicinity of Tc , and these deviations are strongest in the crossover regime. We demonstrate the existence of temperature-induced crossover between 0 and π states in the contact and show that the smoothness of this transition strongly depends on the CPR shape.",
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year = "2013",
doi = "10.1103/PhysRevB.88.144519",
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Bakurskiy, SV, Klenov, NV, Soloviev, II, Kupriyanov, MY & Golubov, AA 2013, 'Theory of supercurrent transport in SIsFS Josephson junctions', Physical Review B (Condensed Matter and Materials Physics), vol. 88, no. 14, 144519, pp. 144519-1-144519-13. https://doi.org/10.1103/PhysRevB.88.144519

Theory of supercurrent transport in SIsFS Josephson junctions. / Bakurskiy, S.V.; Klenov, N.V.; Soloviev, I.I.; Kupriyanov, M..Y.; Golubov, Alexandre Avraamovitch.

In: Physical Review B (Condensed Matter and Materials Physics), Vol. 88, No. 14, 144519, 2013, p. 144519-1-144519-13.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Theory of supercurrent transport in SIsFS Josephson junctions

AU - Bakurskiy, S.V.

AU - Klenov, N.V.

AU - Soloviev, I.I.

AU - Kupriyanov, M..Y.

AU - Golubov, Alexandre Avraamovitch

PY - 2013

Y1 - 2013

N2 - We present the results of a theoretical study of current-phase relations (CPRs) Js(φ) in Josephson junctions of SIsFS type, where S is a bulk superconductor and IsF is a complex weak link consisting of a superconducting film s, a metallic ferromagnet F, and an insulating barrier I. At temperatures close to critical, T≲Tc, calculations are performed analytically in the frame of the Ginsburg-Landau equations. At low temperatures a numerical method is developed to solve self-consistently the Usadel equations in the structure. We demonstrate that SIsFS junctions have several distinct regimes of supercurrent transport and we examine spatial distributions of the pair potential across the structure in different regimes. We study the crossover between these regimes, which is caused by shifting the location of a weak link from the tunnel barrier I to the F layer. We show that strong deviations of the CPR from sinusoidal shape occur even in the vicinity of Tc , and these deviations are strongest in the crossover regime. We demonstrate the existence of temperature-induced crossover between 0 and π states in the contact and show that the smoothness of this transition strongly depends on the CPR shape.

AB - We present the results of a theoretical study of current-phase relations (CPRs) Js(φ) in Josephson junctions of SIsFS type, where S is a bulk superconductor and IsF is a complex weak link consisting of a superconducting film s, a metallic ferromagnet F, and an insulating barrier I. At temperatures close to critical, T≲Tc, calculations are performed analytically in the frame of the Ginsburg-Landau equations. At low temperatures a numerical method is developed to solve self-consistently the Usadel equations in the structure. We demonstrate that SIsFS junctions have several distinct regimes of supercurrent transport and we examine spatial distributions of the pair potential across the structure in different regimes. We study the crossover between these regimes, which is caused by shifting the location of a weak link from the tunnel barrier I to the F layer. We show that strong deviations of the CPR from sinusoidal shape occur even in the vicinity of Tc , and these deviations are strongest in the crossover regime. We demonstrate the existence of temperature-induced crossover between 0 and π states in the contact and show that the smoothness of this transition strongly depends on the CPR shape.

KW - METIS-301652

KW - IR-88959

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DO - 10.1103/PhysRevB.88.144519

M3 - Article

VL - 88

SP - 144519-1-144519-13

JO - Physical review B: Covering condensed matter and materials physics

JF - Physical review B: Covering condensed matter and materials physics

SN - 2469-9950

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