<s>
ABINIT	B-Application
is	O
an	O
open-source	B-Application
suite	B-Application
of	O
programs	O
for	O
materials	O
science	O
,	O
distributed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
ABINIT	B-Application
implements	O
density	O
functional	O
theory	O
,	O
using	O
a	O
plane	O
wave	O
basis	O
set	O
and	O
pseudopotentials	O
,	O
to	O
compute	O
the	O
electronic	O
density	O
and	O
derived	O
properties	O
of	O
materials	O
ranging	O
from	O
molecules	O
to	O
surfaces	O
to	O
solids	O
.	O
</s>
<s>
A	O
web-based	O
easy-to-use	O
graphical	O
version	O
,	O
which	O
includes	O
access	O
to	O
a	O
limited	O
set	O
of	O
ABINIT	B-Application
's	O
full	O
functionality	O
,	O
is	O
available	O
for	O
free	O
use	O
through	O
the	O
nanohub	O
.	O
</s>
<s>
ABINIT	B-Application
implements	O
density	O
functional	O
theory	O
by	O
solving	O
the	O
Kohn	O
–	O
Sham	O
equations	O
describing	O
the	O
electrons	O
in	O
a	O
material	O
,	O
expanded	O
in	O
a	O
plane	O
wave	O
basis	O
set	O
and	O
using	O
a	O
self-consistent	O
conjugate	O
gradient	O
method	O
to	O
determine	O
the	O
energy	O
minimum	O
.	O
</s>
<s>
Materials	O
that	O
can	O
be	O
treated	O
by	O
ABINIT	B-Application
include	O
insulators	O
,	O
metals	O
,	O
and	O
magnetically	O
ordered	O
systems	O
including	O
Mott-Hubbard	O
insulators	O
.	O
</s>
