نتایج جستجو برای: spin polarised transport
تعداد نتایج: 392702 فیلتر نتایج به سال:
We have investigated single electron spin transport in individual single crystal bcc Co30Fe70 nanoparticles using scanning tunnelling microscopy with a standard tungsten tip. Particles were deposited using a gas-aggregation nanoparticle source and individually addressed as asymmetric double tunnel junctions with both a vacuum and a MgO tunnel barrier. Spectroscopy measurements on the particles ...
production in polarised p–p scattering as a probe of the proton spin structure Abstract We present the results of a detailed study of the large transverse momentum Drell-Yan process, pp → (γ * , Z *)X → l + l − X at collider energies, with either one or both protons polarised, allowing the study of single-and double-spin asymmetries respectively. We show how these asymmetries obtained from angu...
Short dangling bond wires (DB wires), fabricated on H-terminated Si(001) surfaces, show patterns of displacement that depend on their length. We have performed density function calculations, with and without spin-polarisation, designed to investigate the atomic and electronic structure of these wires. As expected, we find that even length wires are accurately modelled by non-spin polarised calc...
A polarised QCD condensate: νp elastic scattering as a probe of U A (1) dynamics Abstract U A (1) dynamics have the potential to induce a polarised condensate inside a nucleon. The formation of this condensate is related to the realisation of U A (1) symmetry breaking by tunneling processes such as instantons. If it is present, the polarised condensate induces a term in g 1 which has support on...
Preliminary results are reported from the HERMES experiment at HERA/DESY for the spin asymmetry g 1 =F 1 and the polarised structure function g p 1 of the proton and for an extraction of polarised quark-distributions from a combination of Helium-3 and Hydrogen data The HERMES experiment at DESY uses the HERA 27.5 GeV polarised positron beam in combination with a polarised internal gas target to...
We show that for a quantum wire with local asymmetric scattering potential the principal channels charge and heat rectification decouple renormalise differently under electron interactions, generally being more relevant. The polarisation of results from interference is tuneable through external gating. Furthermore, spin polarised or helical electrons sufficiently strong interactions regime can ...
The photoelectrons emitted by lead atoms exposed to circularly-polarised vuv radiation are partially spin polarised. Unlike the photoionisation cross section, the measured polarisation does not show autoionisation resonances as a function of wavelength. The polarisation and the known cross section results together yield new absorption data, which can be compared with the oscillator strengths of...
Organic semiconductors constitute promising candidates toward large-scale electronic circuits that are entirely spintronics-driven. Toward this goal, tunneling magnetoresistance values above 300% at low temperature suggested the presence of highly spin-polarized device interfaces. However, such spinterfaces have not been observed directly, let alone at room temperature. Thanks to experiments an...
The problem of our understanding of the spin structure of the nucleon has been with us since the publication of the EMC measurements of the polarised structure function of the proton in 1987. In this talk a review of the results presented in Working Group 6 at this workshop is given. In the simple quark model the spin of the proton is carried by its three valence quarks so that ∆Σ = ∆u + ∆d = 1...
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