Scattering and Tunneling of Electronic Excitations in the Intermediate State of Superconductors

Demers, Jacques; Griffin, Allan

doi:10.1139/p71-033

Cited by 65 publications

(35 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since early experiments by Tomasch, 30 the geometric resonance nature of the differential conductance oscillations in SNS and NSN tunnel junctions has been ascribed to the electron interference in the central film. 31,32,33,34 Recently, McMillan-Rowell oscillations were observed in SNS edge junctions of d-wave superconductors and used for measurements of the superconducting gap and the Fermi velocity. 35 In this paper we study coherent electronic transport in FSF double-barrier junctions (and NSN as a special case) within the framework of BCS theory.…”

Section: 2122mentioning

confidence: 99%

Erratum: Coherent effects in double-barrier ferromagnet∕superconductor∕ferromagnet junctions [Phys. Rev. B66, 134524 (2002)]

Božović¹,

Radović²

2005

Phys. Rev. B

View full text Add to dashboard Cite

Coherent quantum transport in ferromagnet/superconductor/ferromagnet (FSF) double-barrier junctions is studied. Analytic expressions for charge and spin conductance spectra are derived for the general case of insulating interfaces (from metallic to tunnel limit), the Fermi velocity mismatch, and for parallel (P) and antiparallel (AP) alignment of the electrode magnetizations. We focus on two characteristic features of finite size and coherency: subgap electronic transport, and oscillations of the differential conductance. Periodic vanishing of the Andreev reflection at the energies of geometrical resonances above the superconducting gap is a striking consequence of the quasiparticle interference. In contrast with the case of incoherent transport, a non-trivial spin-polarization without the excess spin accumulation is found for the AP alignment.

show abstract

Section: 2122mentioning

confidence: 99%

Erratum: Coherent effects in double-barrier ferromagnet∕superconductor∕ferromagnet junctions [Phys. Rev. B66, 134524 (2002)]

Božović¹,

Radović²

2005

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…If the thickness d of the superconducting slab is much larger than the coherence length ξ the electrons incident on the slab are reflected as holes, and the normal current converts into the supercurrent. Single-electron tunneling through an N-S-N structure decays exponentially with the slab thickness giving rise, in particular, to the exponential drop off of the electronic contribution to the thermal conductance [1,2]. A single-particle transport through NSN recovers by applying a strong magnetic field, which creates vortex lines where the gap in the spectrum is suppressed.…”

mentioning

confidence: 99%

“…where H (1,2) l are the Hankel functions, l = µ 2 + 1/4, assuming thatŵ = (w 1 , w 2 ) are slow functions of r and z. Following [14] we put x = √ r 2 − b 2 , b = −µ/k r and define the trajectories dx = ±ds ± sin θ, dz = ds ± cos θ forŵ (±) , respectively, where k z = k F cos θ and ds ± is the distance along the corresponding trajectory.…”

mentioning

confidence: 99%

Single-electron transport through the vortex core levels in clean superconductors

2003

View full text Add to dashboard Cite

We develop a microscopic theory of single-electron transport in N-S-N hybrid structures in the presence of applied magnetic field introducing vortex lines in a superconductor layer. We show that vortex cores in a thick and clean superconducting layer are similar to mesoscopic conducting channels where the bound core states play the role of transverse modes. The transport through not very thick layers is governed by another mechanism, namely by resonance tunneling via vortex core levels. We apply our method to calculation of the thermal conductance along the magnetic field.

show abstract

“…We have already cited the thermal conductivity calculations of Demers and Griffin [6] and Ambegaokar and Griffin [21]. Another application which has been suggested [22] is the calculation of the local fields and energy dissipation in the mixed state of type I1 superconductors.…”

Section: Summary and Discussionmentioning

confidence: 99%

Quasiparticle, charge, and energy conservation in weak‐coupling superconductors

Mathews

1978

Physica Status Solidi (b)

View full text Add to dashboard Cite

The conservation of quasiparticles, electric charge, and energy in weak-couplihg superconductors is discussed and correlated with the interpretation of the quasiparticles as particle and hole excitations. The formulation employed is that of the Bogolyubov-de Gennes equations. In the absence of spin-dependent interactions these equations are written in the form of a time-dependent Schrodinger equation with a two-component wave function and a two-by-two matrix Hamiltonian. Accordingly, the desired conservation laws are discussed on much the same basis as in ordinary quantum theory. The generalization to permit nonlocal quasiparticle and pair potentials and spin-dependent interactions is briefly presented.Die Konservierung von Quasipartikeln, elektrischer Ladung und Energie in schwach-gekoppelten Supraleitern wird besprochen und mit der Auslegung von Quasipartikeln als Partikel-und Lijcheranregungen in ffbereinstimmung gebracht. Die angewandten Formulierungen sind diejenigen der Bogolyubov-de Gennes-Gleichungen. Ohne spimbhiingige Wechselwirkungen werden diese Gleichungen als eine zeitabhiingige Schrodinger-Gleichung betrachtet, die als Wellenfunktion mit zwei Komponenten und einer Hamilton-Matrix vom Rang awei behandelt werden. Entsprechend werden die Gesetze der Konservierung auf der gleichen Basis wie in der iiblichen Quantentheorie besprochen. Die Verallgemeinerung auf nichtlokale Quasipartikelpotentiale und Paarpotentiale und auf spinabhiingige Wechselwirkungen wird kura besprochen.

show abstract

Scattering and Tunneling of Electronic Excitations in the Intermediate State of Superconductors

Cited by 65 publications

References 0 publications

Erratum: Coherent effects in double-barrier ferromagnet∕superconductor∕ferromagnet junctions [Phys. Rev. B66, 134524 (2002)]

Erratum: Coherent effects in double-barrier ferromagnet∕superconductor∕ferromagnet junctions [Phys. Rev. B66, 134524 (2002)]

Single-electron transport through the vortex core levels in clean superconductors

Quasiparticle, charge, and energy conservation in weak‐coupling superconductors

Contact Info

Product

Resources

About