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Showing 1 to 19 of 19 for “"Pair-Breaking"”.
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Upper critical magnetic field of superconducting films with magnetic impurities
… spins is weak. The theory predicts that the pair-breaking effect of the magnetic impurities is temperature-independent, and that the pair-breaking effects of the magnetic impurities and the applied magnetic field are additive. Furthermore, it predicts explicitly the temperature dependence of …
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3d magnetic dopant atoms in transition-metal superconductors: Part I: Localized magnetic moments on chromium and manganese dopant atoms in niobium and vanadium; Part II: The effects of chromium and manganese dopant atoms on the upper critical magnetic field of niobium
… in Nb and V. The second part deals with the pair-breaking effects of Cr and Mn dopant atoms on the upper critical magnetic field of Nb. In Part I we review the experimental situation regarding the presence of localized magnetic moments on 3d dopant atoms in transition-metal superconductors, …
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Three-Dimensional Magnetic Dopant Atoms in Transition-Metal Superconductors: Part I. Localized Magnetic Moments on Chromium and Manganese Dopant Atoms in Niobium and Vanadium. Part Ii. The Effects Ofchromium and Manganese Dopant Atoms on The Upper Critical Magnetic Field of Niobium (Squid)
… in Nb and V. The second part deals with the pair-breaking effects of Cr and Mn dopant atoms on the upper critical magnetic field of Nb.
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Composition dependence of superconductivity in YBa₂(Cu<sub>1-x</sub>A<sub>x</sub>)₃O<sub>6+δ</sub> system with A = Zn, Ni
… more than Ni. We discuss our results in terms of pair breaking by magnetic impurities and in terms of the Resonance Valence Bond model proposed by Anderson.
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Vortices and Quasiparticles in Superconducting Microwave Resonators
… quasiparticles are generated either by stray pair-breaking radiation or by direct injection using normal-insulator-superconductor (NIS)-tunnel junctions.</p>
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Properties of the Helium-3 a-B Phase Boundary
… dissipative mechanism is proposed to be pair-breaking, and a saturation of the terminal velocity at low temperatures is predicted.
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Properties of the 3He A-B phase boundary
… dissipative mechanism is proposed to be pair-breaking, and a saturation of the terminal velocity at low temperatures is predicted.
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Counting nonequilibrium quasiparticles in a superconductor
Superconductivity is based on the Cooper pairing of electrons, which enables flow of electrical current without resistance, expulsion of magnetic fields in the Meissner effect, as well as electrical circuits obeying the rules of quantum mechanics. Such superconducting circuits are currently under …
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Superconducting Microwave Resonators for Low Loss Sensor Applications
… to suppress the superconducting gap and reduce pair-breaking frequency. I integrate this with a planar, double dipole Yagi antenna fabricated on membranes. I design a bespoke test system to multiplex Yagi-KIDs, and present initial dark tests. These results show promise that with continued …
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Low Field Microwave Absorption in Nano-Magnetic Participle - incorporated YBa2Cu3O7-z Superconducting Materials
… superconductor provides proximity-boosted Cooper pairs. This perceived necessity to start with another superconductor is engrained in the exten- sive study of the proximity e ect in superconductor/ferromagnet (S/F) powder sample, where all the structures involve a superconductor with either stable …
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The effect of manganese doping on the superconducting transition temperature and the upper critical field of tin-molybdenum-sulfide
… again. Manganese would norma11y have strong pair-breaking effects on the quasipartic1es, but our results provide an exception. X-ray Absorbtion Near-Edge Structure (XANES) measurements showed that the manganese exists as Mn+6 in our compound. Six of its seven valence electrons are transfered …
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Supercurrents in Restricted Geometries and Driven by Time-Dependent Electric Fields
… current-phase relation. It was shown that the pair-breaking effect of the separating wall has no significant influence on the functional dependence of the current on the phase difference. The wall mainly reduces the amplitude of the current. For orifices with radii comparable with the coherence …
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Quasiparticle beam profile measurements in superfluid helium 3 - B
… beam at velocities slightly higher than the pair-breaking critical velocity which spreads out at higher velocities. At 21 mm/s the vibrating resonator is found to have a more focused beam than the Black-Body radiator where both beam profiles are found to be focused around the centre of the …
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Light scattering studies of heavy fermion and high Tc superconductors
… excitation of superconducting quasiparticle pairs above the gap. The observed anisotropy in the Raman matrix elements associated with these superconducting gap excitations lV presents strong evidence for substantial gap anisotropy in YBa2Cu301-B· However, our lowest temperature data also …
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Charge dynamics in superconducting double dots
… two level manifold of even charge parity Cooper pair states, and continuous bands corresponding to charge states with single quasiparticles in one or both islands. These devices are fabricated using shadow mask evaporation, and are measured at sub Kelvin temperatures using a dilution …
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Fermi Mixtures: Effects of Engineered Confinements
… enhances the Chandrasekhar-Clogston limit due to pair breaking at the border between the superfluid and the normal phase, while it leaves the global critical polarization Pc of the trapped system unaffected. In the case of an unpolarized unitary superfluid the rotation causes a phase separation …
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BEC-BCS crossover with Feshbach resonance for three-hyperfine-species model
… parameters. It is nevertheless gapped at the the pair-breaking energy.
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Synthesis and magnetic properties of novel Ln[subscript 2-x]MxCuO[subscript 4+y] compositions (Ln = La,Pr,Nd,Sm,Eu,Gd; M = Ca,Sr,Ba; 0<=x<=0.2; -0.5<=y<=0.5)
… by doping level, we infer the localization and pair-breaking mechanism induced by doped holes. Phase separation is realized within the appearance of three-dimensional antiferromagnetic order. We also observe scaling properties of susceptibilities versus renormalized temperatures and infer the …
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Thermodynamik von Mehrband-Supraleitern
In der vorliegenden Arbeit werden die mikroskopischen Eigenschaften des supraleitenden Zustands von MgCNi3, MgB2 und einigen Seltenerd-Nickel-Borkarbiden anhand von Messungen der spezifischen Wärme untersucht. Der die Supraleitung verursachende Cooper-Paarzustand der Elektronen wird durch eine …