1. rewritten the core part of the ESM to improve readability and efficiency
of the code (esm.f90).
2. introduce a new function (exp_erfc(x,y) = exp(x) * erfc(y)) to avoid
getting “NaN” in particular case.
4. two dimensional (xy plane) average charge density and electrostatic
potentials are printed out to ‘prefix.esm1’ instead of stdout
3. make ESM calculation compatible with the NEB (neb.x).
4. introduce the constant bias potential (constant-mu)
(PRL 109, 266101 (2012)) feature to both pw.x and neb.x.
5. write ESM information in the XML file (One can use post-processing program
such as pp.x).
6. including various example calculations.
git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@11662 c92efa57-630b-4861-b058-cf58834340f0
giannozz