<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>φ</mml:mi></mml:math>-state and inverted Fraunhofer pattern in nonaligned Josephson junctions

Alidoust, Mohammad; Linder, Jacob

doi:10.1103/physrevb.87.060503

Cited by 54 publications

(46 citation statements)

References 36 publications

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“…The AJE has been predicted in junctions which combine conventional superconductors with magnetism and spinorbital interaction [15][16][17][18][19][20][21][22][23], between unconventional superconductors [24], and between topologically nontrivial superconducting leads [25]. In the presence of magnetic flux piercing the normal interlayer superconducting proximity currents are generated, which naturally leads to a phase shift of the CPR [26,27]. Experimentally, a ϕ 0 junction has been reported between two superconductors coupled via a nanowire quantum dot [28] controlled by an electrostatic gate.…”

Section: Introductionmentioning

confidence: 99%

Anomalous current in diffusive ferromagnetic Josephson junctions

2017

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We demonstrate that in diffusive superconductor/ferromagnet/superconductor (S/F/S) junctions a finite, anomalous Josephson current can flow even at zero phase difference between the S electrodes. The conditions for the observation of this effect are noncoplanar magnetization distribution and a broken magnetization inversion symmetry of the superconducting current. The latter symmetry is intrinsic for the widely used quasiclassical approximation and prevented previous works based on this approximation from obtaining the Josephson anomalous current. We show that this symmetry can be removed by introducing spin-dependent boundary conditions for the quasiclassical equations at the superconducting/ferromagnet interfaces in diffusive systems. Using this recipe, we consider generic multilayer magnetic systems and determine the ideal experimental conditions in order to maximize the anomalous current.

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Section: Introductionmentioning

confidence: 99%

Anomalous current in diffusive ferromagnetic Josephson junctions

2017

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“…This is the so called ϕ 0 -junction, and its interpretation in terms of the inverse magneto-electric effect was reported in 46 . It was actively studied recently in half-metal junctions, noncoplanar ferromagnetic junctions, ferromagnetic Josephson junctions with spin orbit interaction or TI surface states [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] .…”

Section: Introductionmentioning

confidence: 99%

Quasiclassical theory of magnetoelectric effects in superconducting heterostructures in the presence of spin-orbit coupling

Bobkova

Bobkov

2017

Phys. Rev. B

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The quasiclassical theory in terms of equations for the Green's functions (Eilenberger equations) is generalized in order to allow for quantitative description of the magneto-electric effects and proximity-induced triplet correlations in the presence of spin-orbit coupling in hybrid superconducting systems. The formalism is valid under the condition that the spin-orbit coupling is weak with respect to the Fermi energy, but exceeds the superconducting energy scale considerably. On the basis of the derived formalism it is shown that the triplet correlations in the spin-orbit coupled normal metal can be induced by proximity to a singlet superconductor without any exchange or external magnetic field. They contain an odd-frequency even-momentum component, which is stable against disorder. The value of the proximity-induced triplet correlations is of the order of ∆so/εF , that is absent in the framework of the standard quasiclassical approximation, but can be described by our theory. The spin polarization, induced by the Josephson current flowing through the superconductor/Rashba metal/superconductor junction, is also calculated.

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“…However, as far as we know, the effect of disorders has not been discussed. The tilting of the magnetic field in topological nanowire junctions has demonstrated rich phenomena [39,40,41]. It is a natural question to consider the effect of a tilted magnetic field in the disordered nanowire Josephson junction.…”

Section: Introductionmentioning

confidence: 99%

Majorana ϕ 0 -junction in a disordered spin-orbit coupling nanowire with tilted magnetic field

Huang¹,

Liang²,

Yao³

et al. 2017

Physica C: Superconductivity and its Applications

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Majorana Josephson junctions in nanowire systems exhibit a pseudo-4π period current-phase relation in the clean limit. In this work, we study how this current-phase relation responds to a tilted magnetic field in a disordered Majorana Josephson junction within the Bogoliubov-de Gennes approach. We show that the tilted magnetic field induces a φ 0 phase shift to the currentphase relation. Most importantly, we find that this φ 0 -junction behavior is robust even in the presence of disorders.

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φ-state and inverted Fraunhofer pattern in nonaligned Josephson junctions

Cited by 54 publications

References 36 publications

Anomalous current in diffusive ferromagnetic Josephson junctions

Anomalous current in diffusive ferromagnetic Josephson junctions

Quasiclassical theory of magnetoelectric effects in superconducting heterostructures in the presence of spin-orbit coupling

Majorana ϕ 0 -junction in a disordered spin-orbit coupling nanowire with tilted magnetic field

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