text for graphene flake

content/index.txt

@@ -49,9 +49,12 @@ Graphene flake
    .. image:: graphene-edgestate.svgz
       :width: 15em
 
-Graphene flake wave funcion (to be expanded).
-
-Taken from the Kwant `plotting tutorial <doc/1.0/tutorial/tutorial6.html>`_.
+Wave function of a low energy eigenstate of a graphene flake. The size of each
+circle is proportional to the wave function probability amplitude on that site.
+It is clearly seen that the wave function is peaked near the zigzag segments of
+the boundary, as can be `expected <http://arxiv.org/abs/1003.4602>`_ for
+graphene quantum dots. The image is taken from the Kwant `plotting tutorial
+<doc/1.0/tutorial/tutorial6.html>`_.
 
 
 3-d system: Majorana states