<s>
Spin	B-General_Concept
pumping	I-General_Concept
is	O
a	O
method	O
of	O
generating	O
a	O
spin	O
current	O
,	O
the	O
spintronic	O
analog	O
of	O
a	O
battery	O
in	O
conventional	O
electronics	O
.	O
</s>
