wB97X-D functional with libxc-3.0.0
John Herr
jhe... at nd.edu
Wed Jun 28 15:30:42 UTC 2017
I'm trying to get the wB97X-D functional working in cp2k-4.1. I have
already compiled cp2k with libxc-3.0.0, and I am trying to compare a
calculation of a single water molecule with q-chem to make sure it's
correct (will compare with more later, just using this as a starting
point). For reference I am using the 6-311g** basis. In q-chem I can get an
energy component breakdown like this
---------------------------------------
Cycle Energy DIIS Error
---------------------------------------
1 -76.3663998805 1.11E-01
2 -76.3620453973 2.72E-02
3 -76.3749719700 2.59E-02
4 -76.4212961721 1.07E-03
5 -76.4213693768 2.28E-04
6 -76.4213747966 2.02E-05
7 -76.4213748557 1.79E-06 Convergence criterion met
---------------------------------------
One-Electron Energy = -123.5178738137
Total Coulomb Energy = 47.1112629588
Alpha Exchange Energy = -1.4239467336
Beta Exchange Energy = -1.4239467336
DFT Exchange Energy = -6.0846516212
DFT Correlation Energy = -0.4328050558
Nuclear Repu. Energy = 9.3505861434
Nuclear Attr. Energy = -199.8742482744
Kinetic Energy = 76.3563744607
which I would like to compare with cp2k to make sure the components of the
energy are right, but I can't seem to figure out how to get these to print,
or what to compare them to out of what does print out. Here is the energy
breakdown after the last iteration from cp2k
11 DIIS/Diag. 0.73E-05 1.6 0.00000731 -76.4226387492
-1.09E-09
*** SCF run converged in 11 steps ***
Electronic density on regular grids: -7.9264937891
2.0735062109
Core density on regular grids: 10.0000000000
-0.0000000000
Hard and soft densities (Lebedev): -16.3078231164
-14.2343170120
Total Rho_soft + Rho1_hard - Rho1_soft -9.9999998935
Total charge density (r-space): 0.0000001065
Total Rho_soft + Rho0_soft (g-space): 0.0000001024
Overlap energy of the core charge distribution:
0.00000020808927
Self energy of the core charge distribution:
-75.73106814560732
Core Hamiltonian energy:
-5.18060334470231
Hartree energy:
21.19955249945549
Exchange-correlation energy:
-2.68058148507007
Hartree-Fock Exchange energy:
-2.84801596711676
GAPW| Exc from hard and soft atomic rho1:
-3.83867168544622
GAPW| local Eh = 1 center integrals:
-7.34325082876699
Total energy:
-76.42263874916490
I have attached my cp2k input file. I think that I have the HF interaction
potential set correctly, but not 100% sure on that. As far as the vdW
potential, I am not sure what to set, as it seems that cp2k only has the
zero damping and Becke-Johnson damping function, but the damping function
in wB97X-D is different from either of these. Any help with this would be
much appreciated.
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