Enter an atomic species:
Cu
Enter a cubic lattice type:
fcc
Enter a model name:
EAM_NN_Johnson_1988_Cu__MO_887933271505_003
Enter a lattice constant (m):
3.61472986638546e-10

WARNING, 1 imaginary frequencies at q = ( 0.00,  0.00,  0.00) ; (omega_q = 2.561e-09*i)
WARNING, 1 imaginary frequencies at q = ( 0.00,  0.00,  0.00) ; (omega_q = 2.561e-09*i)