Re: [Pw_forum] Work function issues

2016-04-22 Thread Giuseppe Mattioli
Dear all If you do not want to bother with potential realignment in slab calcuations of WF you can use the (very nice) new implementation of the ESM method in a vacuum-slab-vacuum framework. The usage is very simple assume_isolated = 'esm', esm_bc='bc1', and you find in the outdir

Re: [Pw_forum] Work function issues

2016-04-22 Thread Giovanni Cantele
Maybe it is neither a poor pseudo potential choice nor a bug or user error. Using for example Au.pbe-mt_fhi.UPF I get Fermi level ~ 3.30 eV vacuum level ~ 8.48eV with a plot similar to what you attach in a follow-up e-mail. That corresponds to a ~ 5.17 gold work function, not that far from

Re: [Pw_forum] Work function issues

2016-04-22 Thread Hepplestone, Steven
advice would be gladly appreciated at this stage. Steve From: pw_forum-boun...@pwscf.org [mailto:pw_forum-boun...@pwscf.org] On Behalf Of Ian Shuttleworth Sent: 21 April 2016 18:05 To: PWSCF Forum <pw_forum@pwscf.org> Subject: Re: [Pw_forum] Work function issues Hi Steven I've just

Re: [Pw_forum] Work function issues

2016-04-21 Thread Ian Shuttleworth
Hi Steven I've just used H and Pt.pbe-mt_fhi.UPF recently and investigated work function (amongst other things) and I didn't encounter any problems: Controlled FCC/on-top binding of H/Pt(111) using surface stress http://dx.doi.org/10.1016/j.apsusc.2016.03.173 With thanks Ian On Thu, Apr

[Pw_forum] Work function issues

2016-04-21 Thread Hepplestone, Steven
Dear all, I am having difficulties with calculating the work function of various metals (Au and Pt in particular) using the X.pbe-mt_fhi.UPF and X.pbe-n-nc.UPF pseudo potentials. Unlike in the example in WorkFct_example in PP I am regularly getting a positive Fermi energy and a vacuum level