Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropy-driven spin relaxation in germanium   A unique spin depolarization mechanism, induced by the presence of g-factor
anisotropy and intervalley scattering, is revealed by spin transport
measurements on long-distance germanium devices in a longitudinal magnetic
field. The confluence of electron-phonon scattering (leading to Elliott-Yafet
spin flips) and this previously unobserved physics enables the extraction of
spin lifetime solely from spin-valve measurements, without spin precession, and
in a regime of substantial electric-field-generated carrier heating. We find
spin lifetimes in Ge up to several hundreds of ns at low temperature, far
beyond any other available experimental results.

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The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol