Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nanosecond spin-transfer over tens of microns in a bare GaAs/AlGaAs
  layer   The spin-conserving length-scale is a key parameter determining
functionalities of a broad range of spintronic devices including magnetic
multilayer spin-valves in the commercialized magnetic memories or lateral spin
transistors in experimental spin-logic elements. Spatially resolved optical
pump-and-probe experiments in the lateral devices allow for the direct
measurement of the lengthscale and the time-scale at which spin-information is
transferred from the injector to the detector. Using this technique, we
demonstrate that in an undoped GaAs/AlGaAs layer spins are detected at
distances reaching more than ten microns from the injection point at times as
short as nanoseconds after the pump-pulse. The observed unique combination of
the long-range and highrate electronic spin-transport requires simultaneous
suppression of mechanisms limiting the spin life-time and mobility of carriers.
Unlike earlier attempts focusing on elaborate doping, gating, or
heterostructures we demonstrate that the bare GaAs/AlGaAs layer intrinsically
provides superior spin-transport characteristics whether deposited directly on
the substrate or embedded in complex heterostructures.

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The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: alg-geom