def gpawRestart(calc):
from gpaw import restart, PW, Davidson, Mixer, MixerSum, FermiDirac
return restart(
'preCalc_inp.gpw',
mode=PW(calc.pw),
xc=calc.xc,
kpts={
'density': calc.kpt,
'gamma': True
} if isinstance(calc.kpt, int) else calc.kpt,
spinpol=calc.magmom > 0,
convergence={'energy': calc.eConv} #eV/electron
,
mixer=((MixerSum(beta=calc.mixing, nmaxold=calc.nmix, weight=100))
if calc.magmom > 0 else
(Mixer(beta=calc.mixing, nmaxold=calc.nmix, weight=100))),
maxiter=calc.maxsteps,
nbands=-1 * calc.nbands,
occupations=FermiDirac(calc.sigma),
setups='sg15' #(pspDict[calc.psp]).pthFunc[cluster]
,
eigensolver=Davidson(5),
poissonsolver=
None # {'dipolelayer': 'xy'} if isinstance(self,SurfaceJob) else None
,
txt=str(calc) + '.txt',
symmetry={'do_not_symmetrize_the_density':
True} #ERROR IN LI bcc 111 surface
)
def PBEcalc(self):
from gpaw import GPAW, PW, Davidson, Mixer, MixerSum, FermiDirac
return GPAW(
mode=PW(self.pw()) #eV
,
xc='PBE',
kpts=self.kpt(),
spinpol=self.spinpol(),
convergence={'energy': self.econv()} #eV/electron
,
mixer=(
(MixerSum(beta=self.mixing(), nmaxold=self.nmix(), weight=100))
if self.spinpol() else
(Mixer(beta=self.mixing(), nmaxold=self.nmix(), weight=100))),
maxiter=self.maxstep(),
nbands=self.nbands(),
occupations=FermiDirac(self.sigma()),
setups=self.psp(),
eigensolver=Davidson(5),
poissonsolver=
None # {'dipolelayer': 'xy'} if isinstance(self,SurfaceJob) else None
,
txt='%d_%s.txt' % (self.pw(), self.xc()),
symmetry={'do_not_symmetrize_the_density':
True}) #ERROR IN LI bcc 111 surface
def gpawRestart(self):
from gpaw import restart, PW, Davidson, Mixer, MixerSum, FermiDirac
spinpol = any([x > 0 for x in self.magmomsinit()])
return restart(
'preCalc_inp.gpw',
mode=PW(self.pw),
xc=self.xc,
kpts=self.kpt(),
spinpol=spinpol,
convergence={'energy': self.econv()} #eV/electron
,
mixer=(
(MixerSum(beta=self.mixing(), nmaxold=self.nmix(), weight=100))
if spinpol else
(Mixer(beta=self.mixing(), nmaxold=self.nmix(), weight=100))),
maxiter=self.maxstep(),
nbands=self.nbands(),
occupations=FermiDirac(self.sigma()),
setups=self.psp #(pspDict[calc.psp]).pthFunc[cluster]
,
eigensolver=Davidson(5),
poissonsolver=
None # {'dipolelayer': 'xy'} if isinstance(self,SurfaceJob) else None
,
txt='%d_%s.txt' % (self.pw, self.xc),
symmetry={'do_not_symmetrize_the_density':
True}) #ERROR IN LI bcc 111 surface
def gpawCalc(calc, restart=False, surf=False):
"""
Accepts a job (either Surface or Bulk) and returns a Calculator
"""
from gpaw import GPAW, PW, Davidson, Mixer, MixerSum, FermiDirac
return GPAW(
mode=PW(calc.pw) #eV
,
xc=calc.xc,
kpts={
'density': calc.kpt,
'gamma': True
} if isinstance(calc.kpt, int) else calc.kpt,
spinpol=calc.magmom > 0,
convergence={'energy': calc.eConv} #eV/electron
,
mixer=((MixerSum(beta=calc.mixing, nmaxold=calc.nmix, weight=100))
if calc.magmom > 0 else
(Mixer(beta=calc.mixing, nmaxold=calc.nmix, weight=100))),
maxiter=calc.maxsteps,
nbands=-1 * calc.nbands,
occupations=FermiDirac(calc.sigma),
setups='sg15',
eigensolver=Davidson(5),
poissonsolver=
None # {'dipolelayer': 'xy'} if isinstance(self,SurfaceJob) else None
,
txt=str(calc) + '.txt',
symmetry={'do_not_symmetrize_the_density':
True} #ERROR IN LI bcc 111 surface
)
def makeGPAWcalc():
from gpaw import GPAW, PW, Davidson, Mixer, MixerSum, FermiDirac, setup_paths
if p['psp'] == 'oldpaw':
setup_paths.insert(
0, '/scratch/users/ksb/gpaw/oldpaw/gpaw-setups-0.6.6300/')
psp = 'paw'
else:
psp = p['psp']
return GPAW(
mode=PW(p['pw']),
xc=p['xc'],
kpts=json.loads(p['kpts']),
spinpol=p['spinpol'],
convergence={'energy': p['econv']} #eV/electron
,
mixer=((MixerSum(beta=p['mixing'], nmaxold=p['nmix'], weight=100))
if p['spinpol'] else
(Mixer(beta=p['mixing'], nmaxold=p['nmix'], weight=100))),
maxiter=p['maxstep'],
nbands=p['nbands'],
occupations=FermiDirac(p['sigma']),
setups=psp,
eigensolver=Davidson(5),
poissonsolver=None,
txt='log',
symmetry={'do_not_symmetrize_the_density': True})
def makeGPAWcalc(p):
from gpaw import GPAW, PW, Davidson, Mixer, MixerSum, FermiDirac
return GPAW(
mode=PW(p['pw']),
xc=p['xc'],
kpts=kpt,
spinpol=spinpol,
convergence={'energy': p['econv']} #eV/electron
,
mixer=((MixerSum(beta=p['mixing'], nmaxold=p['nmix'], weight=100))
if spinpol else
(Mixer(beta=p['mixing'], nmaxold=p['nmix'], weight=100))),
maxiter=p['maxstep'],
nbands=p['nbands'],
occupations=FermiDirac(p['sigma']),
setups=p['psp'],
eigensolver=Davidson(5),
poissonsolver=None,
txt='log',
symmetry={'do_not_symmetrize_the_density': True})
def gpawCalc(self, xc, spinpol):
from gpaw import GPAW, PW, Davidson, Mixer, MixerSum, FermiDirac
return GPAW(
mode=PW(self.pw) #eV
,
xc=xc,
kpts=self.kpt,
spinpol=spinpol,
convergence={'energy': self.econv} #eV/electron
,
mixer=((MixerSum(beta=self.mixing, nmaxold=self.nmix, weight=100))
if spinpol else
(Mixer(beta=self.mixing, nmaxold=self.nmix, weight=100))),
maxiter=self.maxstep,
nbands=-1 * self.nbands,
occupations=FermiDirac(self.sigma),
setups='sg15',
eigensolver=Davidson(5),
poissonsolver=
None # {'dipolelayer': 'xy'} if isinstance(self,SurfaceJob) else None
,
txt='%d_%s.txt' % (self.pw, xc),
symmetry={'do_not_symmetrize_the_density':
True}) #ERROR IN LI bcc 111 surface
# this test should coverage the save and restore of
# fermi-levels when using fixmagmom:
#
# yes, fermi-level-splitting sounds a little bit strange
import numpy as np
from ase import Atoms
from gpaw import GPAW, FermiDirac, MixerSum
from gpaw.test import equal
calc = GPAW(occupations=FermiDirac(width=0.1, fixmagmom=True),
mixer=MixerSum(beta=0.05, nmaxold=3, weight=50.0),
convergence={
'energy': 0.1,
'eigenstates': 1.e-4,
'density': 1.e-2
})
atoms = Atoms('Cr', pbc=False)
atoms.center(vacuum=4)
mm = [1] * 1
mm[0] = 6.
atoms.set_initial_magnetic_moments(mm)
atoms.set_calculator(calc)
atoms.get_potential_energy()
ef1 = calc.occupations.get_fermi_levels_mean()
efsplit1 = calc.occupations.get_fermi_splitting()
ef3 = calc.occupations.get_fermi_levels()
calc.write("test.gpw")
d0 = 1.4
delta = 0.05
for i in range(3):
d = d0 + (i - 1) * delta
atoms = Atoms('N2', [[0.5 * L, 0.5 * L, 0.5 * L - 0.5 * d],
[0.5 * L, 0.5 * L, 0.5 * L + 0.5 * d]])
atoms.set_cell([L, L, L])
calc_gs = GPAW(h=0.2,
nbands=-5,
xc=xc,
width=0.05,
eigensolver=eigensolver,
spinpol=True,
txt=None,
mixer=MixerSum(beta=0.1, nmaxold=5, weight=50.0),
convergence={
'energy': 100,
'density': 100,
'eigenstates': 1.0e-9,
'bands': -1
})
atoms.set_calculator(calc_gs)
E0.append(atoms.get_potential_energy())
if i == 1:
F0 = atoms.get_forces()
calc_es = GPAW(h=0.2,
nbands=-5,
xc=xc,
from __future__ import print_function
from ase import Atoms
from ase.units import Hartree
from gpaw import GPAW, PoissonSolver, FermiDirac, Davidson, MixerSum
from gpaw.test import equal
a = 5.0
n = 24
li = Atoms('Li', magmoms=[1.0], cell=(a, a, a), pbc=True)
calc = GPAW(gpts=(n, n, n), nbands=1, xc='PBE',
poissonsolver=PoissonSolver(nn='M', relax='GS'),
mixer=MixerSum(0.3, 5, 10.0),
eigensolver=Davidson(12),
convergence=dict(eigenstates=4.5e-8),
occupations=FermiDirac(0.0))
li.set_calculator(calc)
e = li.get_potential_energy() + calc.get_reference_energy()
niter_PBE = calc.get_number_of_iterations()
equal(e, -7.462 * Hartree, 1.4)
calc.set(xc='revPBE')
erev = li.get_potential_energy() + calc.get_reference_energy()
niter_revPBE = calc.get_number_of_iterations()
equal(erev, -7.487 * Hartree, 1.3)
equal(e - erev, 0.025 * Hartree, 0.002 * Hartree)
print(e, erev)
energy_tolerance = 0.0002
niter_tolerance = 0
def getkwargs():
return dict(eigensolver=Davidson(4), mixer=MixerSum(0.5, 5, 10.0))
from __future__ import print_function
from ase import Atoms
from ase.units import Hartree
from gpaw import GPAW, PoissonSolver, FermiDirac, Davidson, MixerSum
from gpaw.test import equal
a = 5.0
n = 24
li = Atoms('Li', magmoms=[1.0], cell=(a, a, a), pbc=True)
calc = GPAW(gpts=(n, n, n),
nbands=1,
xc=dict(name='oldPBE', stencil=1),
poissonsolver=PoissonSolver(),
mixer=MixerSum(0.6, 5, 10.0),
eigensolver=Davidson(4),
convergence=dict(eigenstates=4.5e-8),
occupations=FermiDirac(0.0))
li.set_calculator(calc)
e = li.get_potential_energy() + calc.get_reference_energy()
niter_PBE = calc.get_number_of_iterations()
equal(e, -7.462 * Hartree, 1.4)
calc.set(xc=dict(name='revPBE', stencil=1))
erev = li.get_potential_energy() + calc.get_reference_energy()
niter_revPBE = calc.get_number_of_iterations()
equal(erev, -7.487 * Hartree, 1.3)
equal(e - erev, 0.025 * Hartree, 0.002 * Hartree)
print(e, erev)
if not os.path.exists('bs_dft.json'):
from ase.dft.kpoints import bandpath
from ase.dft.band_structure import get_band_structure
from gpaw import GPAW, PW, MixerSum, FermiDirac
from gpaw.eigensolvers import CG
calc = GPAW(
mode=PW(400),
maxiter=250,
spinpol=True,
kpts=(3, 3, 3),
xc='LDA',
txt='-',
occupations=FermiDirac(0.02, fixmagmom=True),
mixer=MixerSum(0.02, 5, 100),
)
atoms.set_calculator(calc)
atoms.get_potential_energy()
efermi = calc.get_fermi_level().max()
Nk = len(calc.get_ibz_k_points())
Ns = calc.get_number_of_spins()
eigval = np.array(
[[calc.get_eigenvalues(kpt=k, spin=s) for k in range(Nk)]
for s in range(Ns)])
evbm = np.max(eigval[eigval < efermi])
calc.set(
nbands=8, # 4 occupied and 4 unoccupied bands
fixdensity=True,
eigensolver=CG(niter=5),
(5.730, 3.938, 6.371), (7.367, 3.948, 6.324),
(6.587, 4.124, 7.778), (3.946, 5.728, 6.360),
(3.946, 7.364, 6.360), (4.138, 6.546, 7.789),
(5.730, 9.153, 6.371), (7.368, 9.143, 6.324),
(6.587, 8.967, 7.778), (9.152, 5.726, 6.339),
(9.152, 7.365, 6.339), (8.981, 6.546, 7.770),
(7.052, 5.724, 4.128), (7.052, 7.367, 4.128),
(5.627, 6.546, 4.105), (6.608, 6.631, 9.102),
(4.108, 4.248, 4.703)]
molecule += Atom('Cl', (8.72, 9.04, 4.6))
molecule.center(vacuum=4.0)
molecule.set_constraint(FixAtoms(indices=[0]))
molecule[0].magmom = 1
# Calculator
name = 'osam5cl3'
mixer = MixerSum(0.05, 5, weight=100.0)
calc = GPAW(
h=0.18,
xc='PBE',
#nbands=-5,
txt=name + '.txt',
maxiter=200,
stencils=(3, 3),
width=0.1,
mixer=mixer)
molecule.set_calculator(calc)
molecule.get_potential_energy()
calc.set(width=0.05)
# Relaxation of the Cl atom, and calculations...
qn = QuasiNewton(molecule, trajectory=name + '.traj')
qn.run(fmax=0.05)
if rank == 0 and atom not in setups:
g = Generator(atom, 'LB94', nofiles=True, txt=txt)
g.run(**parameters[atom])
setups[atom] = 1
barrier()
SS = Atoms(atom, magmoms=[magmom], cell=(7, 7, 7), pbc=False)
SS.center()
# fine grid needed for convergence!
c = GPAW(h=0.2,
xc='LB94',
nbands=-2,
spinpol=True,
hund=True,
eigensolver=Davidson(3),
mixer=MixerSum(0.5, 7, 50.0),
occupations=FermiDirac(0.0, fixmagmom=True),
txt=txt)
c.calculate(SS)
# find H**O energy
eps_n = c.get_eigenvalues(kpt=0, spin=0) / 27.211
f_n = c.get_occupation_numbers(kpt=0, spin=0)
for e, f in zip(eps_n, f_n):
if f < 0.99:
break
e_homo = e
e_homo = int(e_homo * 10000 + .5) / 10.
diff = e_ref + e_homo
print('%2s %8g %6.1f %4.1f' % (atom, e_ref, -e_homo, diff))
assert abs(diff) < 15
