Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electrical spin injection from ferromagnet into an InAs heterostructures
  through MgO tunnel barrier   We have investigated electrical spin injection from Ni81Fe19 into an InAs
quantum well through MgO tunneling barrier for potential application to
InAs-based spin field effect transistor. Injected spin polarized current were
detected in both nonlocal and local spin valve set-ups and the spin diffusion
length and spin injection efficiency were analyzed. The spin diffusion length
was estimated to be 1.6 {\mu}m in nonlocal set-up at 1.4 K. The spin
polarization of Ni81Fe19/MgO/InAs as-deposited sample was relealed to be 6.9 %,
while increased spin polarization of 8.9 % was observed by additional thermal
treatment.

6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph