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Room temperature electronic diffusion is studied in 3 mum thick epitaxial p+ GaAs lift-off films using a novel circularly polarized photoluminescence microscope. The method is equivalent to using a standard optical microscope and provides a…

介观与纳米尺度物理 · 物理学 2010-11-15 I. Favorskiy , D. Vu , E. Peytavit , S. Arscott , D. Paget , A. C. H. Rowe

We show that the transverse components of spin current in a ferromagnet is linked to an off diagonal spin component of the transmission matrix at interfaces;it has little to do with the mismatch of band structures between dissimilar metals.…

介观与纳米尺度物理 · 物理学 2009-11-10 Jianwei Zhang , Peter M Levy , Shufeng Zhang , Vladimir Antropov

Hyperpolarized nanoparticles (NPs) offer high polarization levels with room temperature relaxation times exceeding half an hour. In this work, we demonstrate that the achievable hyperpolarization enhancement and relaxation (decay) time at…

Spatially-resolved techniques of laser scanning microscopy (LSM) have been used to image simultaneously the spatial variations of (i) rf current flow, J$_RF$(x,y), of (ii) areas of resistive dissipation and (iii) the sources of microwave…

超导电性 · 物理学 2009-09-14 Alexander P. Zhuravel , Steven M. Anlage , Stephen Remillard , Alexey V. Ustinov

This paper introduces an oscillator scheme based on the oscillations of magnetic domain walls due to spin-polarized currents, where the current is injected perpendicular to the sample plane in a localized part of a nanowire. Depending on…

介观与纳米尺度物理 · 物理学 2015-05-18 G. Finocchio , N. Maugeri , L. Torres , B. Azzerboni

Ultrashort spin current pulses have a great potential of becoming the carriers of information in future ultrafast spintronics. They present the outstanding property of an extremely compressed time profile, which can allow for the building…

材料科学 · 物理学 2018-03-28 Marco Battiato

We show that electron tunneling from edge states in two-dimensional topological insulator into a parallel electron waveguide leads to the appearance of spin-polarized current in the waveguide. The spin polarization $P$ can be very close to…

介观与纳米尺度物理 · 物理学 2012-09-27 Aleksei A. Sukhanov , Vladimir A. Sablikov

We simulate the electron transport in vertical bi-layer nanowire which can be fabricated in molecular beam epitaxy process with lateral confinement potential formed by means of cleaved overgrowth or surface oxidization methods giving…

介观与纳米尺度物理 · 物理学 2016-01-20 T. Chwiej

We construct a novel scattering theory to investigate magnetoelectrically induced spin polarizations. Local spin polarizations generated by electric currents passing through a spin-orbit coupled mesoscopic system are measured by an external…

介观与纳米尺度物理 · 物理学 2015-05-14 Ph. Jacquod

Swirling flows in conical pipe can be found in a number of industrial processes, such as hydrocylone, separator and rotating machinery. It has been found that wall oscillations can reduce the drag in water channel and pipe flows, but there…

流体动力学 · 物理学 2018-03-07 Yan Xu , Yan-yue Zhang , F. C. G. A. Nicolleau , Zun-ce Wang

We estimate the lock-in domain of the origin of a current control system which is used in common DC/AC inverter designs. The system is a cascade connection of a 4-dimensional linear system (current controller, CC) followed by a…

最优化与控制 · 数学 2026-02-03 Anton Ponomarev , Lutz Gröll , Veit Hagenmeyer

An in situ measurement of spin transport in a graphene nonlocal spin valve is used to quantify the spin current absorbed by a small (250 nm $\times$ 750 nm) metallic island. The experiment allows for successive depositions of either Fe or…

介观与纳米尺度物理 · 物理学 2018-10-24 Walid Amamou , Gordon Stecklein , Steven J. Koester , Paul A. Crowell , Roland K. Kawakami

The longitudinal polarisation transfer from muons to lambda and anti-lambda hyperons, D_LL, has been studied in deep inelastic scattering off an unpolarised isoscalar target at the COMPASS experiment at CERN. The spin transfers to lambda…

高能物理 - 实验 · 物理学 2009-11-05 The COMPASS Collaboration , M. Alekseev

We have performed inelastic neutron scattering on a single crystal sample of Sr14Cu24O41 to study the spin dynamics of the Cu2O3 spin ladder layers, and CuO2 chains. Data collected with incident energies of 50 meV, 200 meV, 350 meV and 500…

凝聚态物理 · 物理学 2009-10-30 Roger S Eccleston , Masatomo Uehara , Jun Akimitsu , Hiroshi Eisaki , Naoki Motoyama , Shin-ichi Uchida , .

The flow of ions through permeable channels causes voltage drop in physiological nanodomains such as synapses, dendrites and dendritic spines, and other protrusions. How the voltage changes around channels in these nanodomains has remained…

软凝聚态物质 · 物理学 2025-01-10 Frédéric Paquin-Lefebvre , David Holcman

Spin transport in graphene carries the potential of a long spin diffusion length at room temperature. However, extrinsic relaxation processes limit the current experimental values to 1-2 um. We present Hanle spin precession measurements in…

介观与纳米尺度物理 · 物理学 2009-12-04 C. Jozsa , T. Maassen , M. Popinciuc , P. J. Zomer , A. Veligura , H. T. Jonkman , B. J. van Wees

We propose and demonstrate spin manipulation by magnetically controlled modulation of pure spin currents in cobalt/copper lateral spin valves, fabricated on top of the magnetic insulator Y$_3$Fe$_5$O$_{12}$ (YIG). The direction of the YIG…

Of the new types of cryoelectronic devices under development, including phase shifters, giant magnetoresistance switches, diodes, transistors, and memory cells, some are based on hybrid superconductor-normal metal or…

介观与纳米尺度物理 · 物理学 2015-12-07 L. S. Uspenskaya , S. V. Egorov

The polarization of conduction electron spins due to an electrical current is observed in strained nonmagnetic semiconductors using static and time-resolved Faraday rotation. The density, lifetime, and orientation rate of the…

介观与纳米尺度物理 · 物理学 2007-05-23 Y. Kato , R. C. Myers , A. C. Gossard , D. D. Awschalom

We study switching current distributions in superconducting nanostrips using theoretical models and numerical simulations. Switching current distributions are commonly measured in experiments and may provide a window into the microscopic…

超导电性 · 物理学 2024-06-28 Robert Vedin , Jack Lidmar