Element = Lattice = Model = Element: N
Lattice: hcp
Model: MEAM_LAMMPS_DoShinLee_2009_GaInN__MO_815057898706_001
Computed model cutoff of 3.999999990463257 Angstroms
Computed isolated atomic energy of 0.0 eV for species N

==============================================================================
==============================================================================
 Starting optimization to find optimum lattice constant 'a' with c/a fixed to
 sqrt(8/3)
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = 1.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 40
         Function evaluations: 113
Results for this minimization:
  a = 4.150000000000007, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 41
         Function evaluations: 116
Results for this minimization:
  a = 4.668749999999999, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 40
         Function evaluations: 113
Results for this minimization:
  a = 4.1875, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 40
         Function evaluations: 113
Results for this minimization:
  a = 4.606250000000014, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 40
         Function evaluations: 113
Results for this minimization:
  a = 5.025000000000008, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 39
         Function evaluations: 111
Results for this minimization:
  a = 4.143750000000003, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 39
         Function evaluations: 111
Results for this minimization:
  a = 4.4624999999999995, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 38
         Function evaluations: 108
Results for this minimization:
  a = 4.03125, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 38
         Function evaluations: 108
Results for this minimization:
  a = 4.300000000000005, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 38
         Function evaluations: 108
Results for this minimization:
  a = 4.568750000000002, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 39
         Function evaluations: 111
Results for this minimization:
  a = 4.8374999999999995, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 38
         Function evaluations: 109
Results for this minimization:
  a = 4.1562499999999964, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 38
         Function evaluations: 109
Results for this minimization:
  a = 4.375, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 37
         Function evaluations: 106
Results for this minimization:
  a = 4.068750000000003, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 37
         Function evaluations: 106
Results for this minimization:
  a = 4.262500000000006, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 37
         Function evaluations: 106
Results for this minimization:
  a = 4.456250000000001, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 36
         Function evaluations: 104
Results for this minimization:
  a = 4.0500000000000025, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 36
         Function evaluations: 104
Results for this minimization:
  a = 4.21875, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 35
         Function evaluations: 101
Results for this minimization:
  a = 4.062500000000002, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 35
         Function evaluations: 101
Results for this minimization:
  a = 4.218750000000003, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 34
         Function evaluations: 99
Results for this minimization:
  a = 4.025, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 34
         Function evaluations: 99
Results for this minimization:
  a = 4.168750000000001, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 33
         Function evaluations: 96
Results for this minimization:
  a = 4.125, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 94
Results for this minimization:
  a = 4.0687500000000005, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 4.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.000305
         Iterations: 33
         Function evaluations: 75
Results for this minimization:
  a = 3.9995493491180243, total energy = -0.00030452097718956453

==============================================================================
==============================================================================
 Starting optimization with both a and c/a relaxed
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = [3.99954935] Angstroms and c = 5.224989390090527 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.048624
         Iterations: 107
         Function evaluations: 209
Results for this minimization:
  a = 3.999995798369505, c = 6.516429925489595, total energy = -0.04862422791563447

Attempting to perform relaxation using initial lattice constant guess of a = [3.99954935] Angstroms and c = 5.551551226971185 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.048624
         Iterations: 105
         Function evaluations: 212
Results for this minimization:
  a = 3.9999957983457035, c = 6.516429925488714, total energy = -0.04862422791563441

Attempting to perform relaxation using initial lattice constant guess of a = [3.99954935] Angstroms and c = 5.878113063851843 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 36
         Function evaluations: 136
Results for this minimization:
  a = 4.299515550301875, c = 6.31897154364073, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = [3.99954935] Angstroms and c = 6.204674900732501 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.048624
         Iterations: 80
         Function evaluations: 163
Results for this minimization:
  a = 3.999995798374712, c = 6.51642992524783, total energy = -0.04862422791563442

Attempting to perform relaxation using initial lattice constant guess of a = [3.99954935] Angstroms and c = 6.531236737613159 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.048872
         Iterations: 92
         Function evaluations: 224
Results for this minimization:
  a = 3.9936312408897496, c = 6.8220496419246, total energy = -0.048871808316725524

Attempting to perform relaxation using initial lattice constant guess of a = [3.99954935] Angstroms and c = 6.857798574493817 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.048872
         Iterations: 95
         Function evaluations: 223
Results for this minimization:
  a = 3.993631240765014, c = 7.046754230524295, total energy = -0.04887180831672547

Attempting to perform relaxation using initial lattice constant guess of a = [3.99954935] Angstroms and c = 7.184360411374475 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.048872
         Iterations: 93
         Function evaluations: 218
Results for this minimization:
  a = 3.9936312410032384, c = 7.51521706906029, total energy = -0.04887180831672548

Attempting to perform relaxation using initial lattice constant guess of a = [3.99954935] Angstroms and c = 7.510922248255133 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.048872
         Iterations: 100
         Function evaluations: 231
Results for this minimization:
  a = 3.993631240825788, c = 7.6968279906735875, total energy = -0.04887180831672544

Attempting to perform relaxation using initial lattice constant guess of a = [3.99954935] Angstroms and c = 7.837484085135791 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.048872
         Iterations: 83
         Function evaluations: 217
Results for this minimization:
  a = 3.9936312408167898, c = 8.204502788499397, total energy = -0.04887180831672544