Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge Imbalance and Crossed Andreev reflection in Py/Ta Devices   Crossed Andreev reflection in a lateral spin valve geometry device is an
aspect of considerable recent interest, particularly with regards to Cooper
pair splitting experiments to realize solid state quantum entanglement. In this
work, devices are fabricated consisting of two ferromagnetic permalloy (Py)
electrodes contacted by a overlaid perpendicular superconducting Ta electrode,
of variable lateral in-plane offset within the expected BCS superconducting
coherence length $\xi_0$. Experimental electrical transport measurements are
presented of local and nonlocal conduction, showing characteristics of
non-local or crossed Andreev reflection in the superconducting state at low
temperatures in addition to nonlocal effects divergent for T$\rightarrow$T$_c$
attributed to nonlocal charge imbalance.

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The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg