quantum-espresso/NEB/examples/neb0.in

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BEGIN
BEGIN_PATH_INPUT
&PATH
restart_mode = 'from_scratch'
string_method = 'neb',
nstep_path = 20,
ds = 2.D0,
opt_scheme = "broyden",
num_of_images = 7,
k_max = 0.3D0,
k_min = 0.2D0,
CI_scheme = "auto",
path_thr = 0.1D0,
/
END_PATH_INPUT
BEGIN_ENGINE_INPUT
&CONTROL
prefix = "H2+H"
/
&SYSTEM
ibrav = 0,
nat = 3,
ntyp = 1,
ecutwfc = 20.0D0,
ecutrho = 100.0D0,
nspin = 2,
starting_magnetization = 0.5D0,
occupations = "smearing",
degauss = 0.03D0,
/
&ELECTRONS
conv_thr = 1.D-8,
mixing_beta = 0.3D0,
/
&IONS
/
ATOMIC_SPECIES
H 1.00794 HUSPBE.RRKJ3
BEGIN_POSITIONS
FIRST_IMAGE
ATOMIC_POSITIONS { bohr }
H -4.56670009 0.00000000 0.00000000 1 0 0
H 0.00000000 0.00000000 0.00000000 0 0 0
H 1.55776676 0.00000000 0.00000000 1 0 0
LAST_IMAGE
ATOMIC_POSITIONS { bohr }
H -1.55776676 0.00000000 0.00000000
H 0.00000000 0.00000000 0.00000000
H 4.56670009 0.00000000 0.00000000
END_POSITIONS
K_POINTS { gamma }
CELL_PARAMETERS { bohr }
12.00000 0.00000 0.00000
0.00000 5.00000 0.00000
0.00000 0.00000 5.00000
END_ENGINE_INPUT
END