Unicode character with superscript

Question

I have an R plot with an axis of dimension squared Angstroms.

I can create the correct Angstrom symbol with Unicode like so:

plot.new()
text(x=0.5, y=0.8         


        

Answer 1

I think the cleanest way is probably:

plot.new()
text(0.5, 0.7, labels = quote("Interface area " * (Å ^ 2)))