Re: [Wien] g factors and NMR shift estimates in semiconductors with spin-orbit couplings

2015-11-26 Thread Peter Blaha
Application of a magnetic field via case.inorb and runsp -orb acts on both, the orbital part (as mentioned, in a crude and approximate way, only inside the spheres and for the selected angular momenta), and on the spin (by shifting spin-up vs. spin-dn potentials). The latted is done in the whol

Re: [Wien] g factors and NMR shift estimates in semiconductors with spin-orbit couplings

2015-11-26 Thread Gavin Abo
I don't know if it helps or not, but the orbital_potentials.pdf document does have some information that describes how Bext is applied to the interstitial region [ http://www.mail-archive.com/wien%40zeus.theochem.tuwien.ac.at/msg12904.html ]. On 11/26/2015 10:35 AM, Joseph Ross wrote: Thanks

Re: [Wien] g factors and NMR shift estimates in semiconductors with spin-orbit couplings

2015-11-26 Thread Joseph Ross
Thanks for the clarifications. We were interested to see if we might detect a cross term such as identified by Tripathi et al., J. Phys. C 18 (1985) L93. They state that for PbTe this term may be quite large. However when setting out to do this we didn’t initially realize that the response at le

Re: [Wien] g factors and NMR shift estimates in semiconductors with spin-orbit couplings

2015-11-24 Thread Peter Blaha
The effect due to a magnetic field via "orb" uses a "double" approximation: i) It applies the field only inside the spheres ii) and it uses a "central field approximation", which is Gauge dependent and valid only in the case of a single atom. This implementation was originally intended for loca

Re: [Wien] g factors and NMR shift estimates in semiconductors with spin-orbit couplings

2015-11-24 Thread Robert Laskowski
Hi, you may consider to use our NMR code, recently added to wien2k. It can use SOC vectors, however SOC Hamiltonian is not at the moment included in the perturbation, I have a strong intention to do it. I suspect that this term may contribute to the shielding itself, but not that much to the

[Wien] g factors and NMR shift estimates in semiconductors with spin-orbit couplings

2015-11-24 Thread Joseph Ross
Dear Wien2k Community We have been recently working on estimating semiconductor g-factors and related issues in order to estimate NMR shifts in semiconductors with spin-orbit coupling. We took GaAs as a test case with SOC, and the band-structure appears to be similar to what has been reported, wi