climbing image tag
Posted: Thu Jan 20, 2011 8:51 am
I am now facing a problem that I am suspecting to be related with the "climbing" part of the NEB calculation.
My current cacluation seems to show two barriers between my initial and final states. Anoyingly, these two barriers seem to be quite close in energy (~0.1 eV), making it difficulty for NEB to find the right image to "climb". From the calculation history, i believed that NEB is struggling to climb either image #2 or #4, preventing the whole calculation to go down to 0.05 ev/A in force from a pre-converged whole set of NEB (0.1 eV/A)
I have two ideas in my mind that welcomes any comment:
#1
Is is a good idea in this case to swictch off the climbing part of the NEB to let the system converged to 0.05 first, and then from there re-run the calculation with the climbing on?
#2
or shall I break down this overal process into two separate NEB calculation, that is one for barrier #1 and one for barrier #2; if this works, do i then need to combine those two sets and re-do an overal NEB?
Thanks
My current cacluation seems to show two barriers between my initial and final states. Anoyingly, these two barriers seem to be quite close in energy (~0.1 eV), making it difficulty for NEB to find the right image to "climb". From the calculation history, i believed that NEB is struggling to climb either image #2 or #4, preventing the whole calculation to go down to 0.05 ev/A in force from a pre-converged whole set of NEB (0.1 eV/A)
I have two ideas in my mind that welcomes any comment:
#1
Is is a good idea in this case to swictch off the climbing part of the NEB to let the system converged to 0.05 first, and then from there re-run the calculation with the climbing on?
#2
or shall I break down this overal process into two separate NEB calculation, that is one for barrier #1 and one for barrier #2; if this works, do i then need to combine those two sets and re-do an overal NEB?
Thanks