Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Room-temperature spin injection and spin-to-charge conversion in a
  ferromagnetic semiconductor / topological insulator heterostructure   Spin injection using ferromagnetic semiconductors at room temperature is a
building block for the realization of spin-functional semiconductor devices.
Nevertheless, this has been very challenging due to the lack of reliable
room-temperature ferromagnetism in well-known group IV and III-V based
semiconductors. Here, we demonstrate room-temperature spin injection by using
spin pumping in a (Ga,Fe)Sb / BiSb heterostructure, where (Ga,Fe)Sb is a
ferromagnetic semiconductor (FMS) with high Curie temperature (TC) and BiSb is
a topological insulator (TI). Despite the very small magnetization of (Ga,Fe)Sb
at room temperature (45 emu/cc), we are able to detect spin injection from
(Ga,Fe)Sb by utilizing the inverse spin Hall effect (ISHE) in the topological
surface states of BiSb with a large inverse spin Hall angle of 2.5. Our study
provides the first demonstration of spin injection as well as spin-to-charge
conversion at room temperature in a FMS/TI heterostructure.

11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph