Search found 4 matches

by dixitmuditk
Thu Dec 04, 2014 11:03 am
Forum: VTSTTools
Topic: Higher Diffusion barrier in unit cell
Replies: 2
Views: 8316

Re: Higher Diffusion barrier in unit cell

Thanks Prof. Graeme for your kind reply.
by dixitmuditk
Mon Dec 01, 2014 3:31 pm
Forum: VTSTTools
Topic: Higher Diffusion barrier in unit cell
Replies: 2
Views: 8316

Higher Diffusion barrier in unit cell

Dear Prof. Graeme, I am doing NEB at the LiFePO4 unit-cell only(four formula unit) and getting significantly higher barrier compared to reported barriers using super-cells. Also, The barriers using Spin polarized NEB are higher than that of NON spin polarized calculations. I feel this is due to imag...
by dixitmuditk
Mon Aug 25, 2014 1:01 pm
Forum: VTSTTools
Topic: Spin Porpoised NEB (Large asymmetrical barriers)
Replies: 2
Views: 8688

Re: Spin Porpoised NEB (Large asymmetrical barriers)

Dear Prof. Graeme,
Many thanks for your kind reply.

Have a nice day!!
by dixitmuditk
Mon Aug 25, 2014 11:35 am
Forum: VTSTTools
Topic: Spin Porpoised NEB (Large asymmetrical barriers)
Replies: 2
Views: 8688

Spin Porpoised NEB (Large asymmetrical barriers)

Dear Prof. Graeme I have done non spin polarized NEB for LiFePO4 unit cell ( at delithiated limit i.e 1 Li in cell) I am getting a nice symmetrical barrier of 0.29 eV. When I switch on the spin polarization, I am getting high asymmetrical barriers. I am using LBFGS optimizer. Looking forward to hear...