Re: [QE-users] Why I can't compute the optical properties of my supercell?

2023-09-12 Thread Paolo Giannozzi
"Exactly", hard to tell, but I would have a look at the estimated memory for your run: do you have that much memory available? Paolo On 9/12/23 16:25, NAIMI SALMA wrote: Dear experts, I'm trying to simulate the optical properties of a supercell, but after some time from running the calculati

Re: [QE-users] Spin counting in hp.x with paramagnetic metals

2023-09-12 Thread Nicola Marzari via users
Dear Theo, unrelated, but it's not a super good idea to describe a paramagnetic state with a non magnetic calculation - many paramagnetic systems have still strong local moments, that are disordered. At high pressure the local moments can disappear (e.g. iron at the ~330GPa of the liquid-s

Re: [QE-users] Spin counting in hp.x with paramagnetic metals

2023-09-12 Thread Theo Weinberger
Dear Iurii, I'll have a look into the source code to see if I can spot anything there. I suspect the only other cause of this could be that the calculation were run on two different machines (ARCHER2 vs CSD3) although I can't see obviously why it would cause this specific problem. In any case,

Re: [QE-users] Spin counting in hp.x with paramagnetic metals

2023-09-12 Thread Theo Weinberger
Dear Iurii, Yes, to be more precise I mean that when I am looking at these systems, I am modelling them as being nonmagnetic and so I was wondering whether it was the spin degeneracy that was causing this difference. I am typically looking at pressure-induced structural transitions in systems

Re: [QE-users] Spin counting in hp.x with paramagnetic metals

2023-09-12 Thread Iurii Timrov via users
Dear Theo, Thanks for clarifications! > I am typically looking at pressure-induced structural transitions in systems > with complex magnetic ground states. However, in some cases the exact > magnetic configurations are unknown and so to simplify the problem (and since > these structural tran

Re: [QE-users] Spin counting in hp.x with paramagnetic metals

2023-09-12 Thread Iurii Timrov via users
Dear Theo, How do you model the paramagnetic state? Please note that "paramagnetic" and "nonmagnetic" state is not the same thing. For nonmagnetic calculations there is a factor of 2 due to spin degeneracy when computing sums over electronic states (i.e. in charge density, occupation matrix,

[QE-users] Spin counting in hp.x with paramagnetic metals

2023-09-12 Thread Theo Weinberger
Dear Quantum Espresso Users, I have been using the hp.x code to calculate the Hubbard-U corrections for correlated metallic systems in both their spin-polarised and paramagnetic states. In several materials I have noticed that the Hubbard-U value determined for a material in its paramagnetic g