[Wien] Electric Field Effects

Hi All, I have been studying the work of Stahn, Pietsch, Blaha, and Schwartz on electric field induced charge density variations (in GaAs) [PRB v63, 165205 (2001). I had a couple of quick questions. In the paper a large (22 formula units) of GaAs is used and the field is inverted halfw

[Wien] Electric Field Effects

It depends a bit on what you are looking for. We were interested in GaAs and the relative change of positions of Ga and As atoms under the E-filed. For this question such large cells are necessary, because in this setup we had 2 kinks and the relaxations near the kink are very much influenced by

[Wien] Electric Field Effects

Thank you for your quick help with my electric field question. I have a couple of other related questions that I am still puzzled about. The first question is the applicability of the Berry phase approach. From what I understand, the Berry phase approach is usually couched within the density

[Wien] Electric Field Effects

I have not done anything else with electric fields since these old papers. We used very large fields (much larger than experiment, otherwise the effects were too small. About Berry phases I'm not an expert, but it seems to be the currently accepted approach. Am 08.08.2012 07:29, schrieb Paul F