Journal ArticleDOI
Proximity effect under nonequilibrium conditions in double-barrier superconducting junctions
TLDR
In this article, a microscopic theory is developed for structures S-N-N′ (S is a superconductor, N, N′ are normal metals) with potential barriers at the interfaces.Abstract:
A microscopic theory is developed for structures S-N-N′ (S is a superconductor, N, N′ are normal metals) with potential barriers at the interfaces. The length of the N layer is supposed to be shorter than the energy relaxation length but longer than the mean free path l , and the dirty case is considered ( l is shorter than the coherence length in the N-layer). The differential conductance is calculated for different values of the barrier resistances compared to the resistance of the middle layer. The conductance has an anomaly (a peak) at voltages V Δ due to an enhancement of the proximity effect at low energies (voltages). The anomaly is suppressed by pairbreaking mechanisms. It is shown that the magnetoconductance can be negative or positive depending on the ratio of the barrier resistances and on the voltage. The AC conductance (admittance) has a peak at a frequency ω Δ . At high voltages V ⪢ Δ a transition from an excess current at high barrier transparencies to a deficit current at low barrier transparencies is found in S-N-N′ (S) structures.read more
Citations
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Journal ArticleDOI
Odd triplet superconductivity and related phenomena in superconductor-ferromagnet structures
TL;DR: In this article, the triplet component of the condensate generated by superconductor-ferromagnet structures is considered, which is odd in frequency and even in momentum, making it insensitive to nonmagnetic impurities.
Journal ArticleDOI
The current-phase relation in Josephson junctions
TL;DR: In this article, the authors provide a theoretical basis for understanding the current phase relation (CPhiR) for the stationary Josephson effect in various types of superconducting junctions.
Journal ArticleDOI
Quasiclassical Green’s function approach to mesoscopic superconductivity
Wolfgang Belzig,Frank K. Wilhelm,Christoph Bruder,Christoph Bruder,Gerd Schön,Andrei D. Zaikin +5 more
TL;DR: In this paper, the properties of mesoscopic normal metal/superconductor heterostructures are described in the framework of quasiclassical many-body techniques, both in equilibrium and nonequilibrium situations.
Journal ArticleDOI
Symmetry and Topology in Superconductors –Odd-Frequency Pairing and Edge States–
TL;DR: In this paper, the symmetry properties of the pairing, i.e., the parity and spin-singlet/spin-triplet, determine the physical properties of superconducting state.
Journal ArticleDOI
Symmetry and Topology in Superconductors - Odd-frequency pairing and edge states -
TL;DR: In this article, the authors discuss the physics of ABS from the viewpoint of the odd-frequency pairing, the topological bulk-edge correspondence, and the interplay of these two issues, and describe how the symmetry of the pairing and topological indices determine the absence/presence of the ZEABS, its energy dispersion, and properties as the Majorana fermions.
References
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Book
Introduction To Superconductivity
TL;DR: In this article, a revised version of the book has been published to incorporate the many new developments in superconductivity, including new topics on high temperature superconductors and nonequilibrium superconductivities.
Journal ArticleDOI
Transition from metallic to tunneling regimes in superconducting microconstrictions: Excess current, charge imbalance, and supercurrent conversion
TL;DR: In this paper, the Bogoliubov equations were used to model the transmission and reflection of particles at the tunnel junction of normal-superconducting micro-constriction contacts, and a simple theory for the $I\ensuremath{-}V$ curves of normal superconducting contacts was proposed to describe the crossover from metallic to tunnel junction behavior.
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Quantum Semiconductor Structures
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Subharmonic energy-gap structure in superconducting constrictions
TL;DR: In this paper, a Boltzmann-equation approach for the calculation of superconducting constrictions is presented, which allows for the inclusion of normal scattering as well as Andreev reflection processes in the constriction.
Journal ArticleDOI
Linearized kinetic equations and relaxation processes of a superconductor near T c
Albert Schmid,Gerd Schön +1 more
TL;DR: In this article, the authors derived a set of linearized equations for the deviation from the equilibrium value of the quasiparticle distribution function as well as of the order parameter, and the equations were solved for the case of an injection of a stationary quaiparticle into a superconductor.