نتایج جستجو برای: spin polarised transport
تعداد نتایج: 392702 فیلتر نتایج به سال:
We propose an effective method for polarising antiprotons in a storage ring by means of a parallel moving polarised electron beam. If their relative kinetic energy is adjusted to the order of 1 keV the probability for spin exchange is as large as 〈σPzz〉 ≈ 270 barn. Using a 80% polarised electron beam with a peak current of 1.2 A and an average of 32 mA a polarisation of the antiproton beam of 5...
Polarised quark distributions are extracted from semi-inclusive deep inelastic scattering data, which include the additional detection of a leading hadron to providestatisticaìàvour-tagging'. Results are combined from both proton and`neutron' targets to isolate the contributions to the nucleon spin of the individual quark avours, including the sea quarks. Spin asymmetries in the semi-inclusive ...
Abstract Combining magnetic and superconducting functionalities enables lower energy spin transfer switching in quantum computing information storage, owing to the dissipationless nature of quasi-particle mediated supercurrents. Here, we put forward a system where emergent spin-ordering diffusion Cooper pairs are achieved at non-intrinsically nor metallo-molecular interface. Electron transport,...
Highly Efficient Spin Filtering of Ballistic Electrons in Hybrid Spin Valve/Semiconductor Structures
Efficient spin detection of photoexcited electrons at room temperature in single ferromagnetic (FM) layer/semiconductor (SC) Schottky barrier structures has recently been demonstrated in our group [1,2]. We find that the photocurrent is dependent on the relative alignment of the light helicity with the FM layer magnetisation and attribute this effect to the spin filtering of electrons at the SC...
We present recent results on elastic deuteron Compton scattering calculations for polarised beans and targets up to next-to-leading order within Chiral Effective Field Theory in the Small Scale Expansion variant to implement a dynamical ∆(1232) degree of freedom. A simple power-counting argument discloses that np-intermediate rescattering states must be explicitly included at leading order alre...
In this paper, spin-dependent electrical transport properties are investigated in a single-crystal magnetic tunnel junction (MTJ) which consists of two ferromagnetic Fe electrodes separated by an MgO insulating barrier. These properties contain electric current, spin polarization and tunnel magnetoresistance (TMR). For this purpose, spin-dependent Hamiltonian is described for Δ1 and Δ5 bands in...
Evidence for a positive longitudinal double-spin asymmetry 〈Aρ1 〉 = 0.24 ± 0.11stat ± 0.02syst in the cross section for exclusive diffractive ρ0(770) vector–meson production in polarised lepton–proton scattering was observed by the HERMES experiment. The longitudinally polarised 27.56 GeV HERA positron beam was scattered off a longitudinally polarised pure hydrogen gas target. The average invar...
It has been observed that the low temperature magnetoresistance behaviour in polycrystalline colossal magnetoresistive (CMR) manganites differ significantly from the single crystals. The polycrystalline samples show large magnetoresistance at temperatures much below the ferromagnetic transition temperature where the magnetoresistance of single crystals is very small. This has conventionally bee...
QCD predictions for spin dependent photonic structure function g γ 1 (x, Q 2) in the low x region of future linear colliders Abstract Spin dependent structure function g γ 1 (x, Q 2) of the polarised photon is analysed within the formalism based upon the unintegrated spin dependent par-ton distributions incorporating the LO Altarelli-Parisi evolution and the double ln 2 (1/x) resummation at low...
We illustrate the use of the invariant spin field for describing permissible equilibrium spin distributions in high energy spin polarised proton beams. 1 A problem and its solution Following the successful attainment of longitudinal e ± polarisation in HERA (Article II) it is natural to consider whether it would be possible to complement the polarised e ± with 820GeV polarised protons [1, 2]. A...
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