Momentum dependent $$d_{xz/yz}$$ band splitting in LaFeAsO

Momentum-dependent band spin splitting in semiconducting MnO2: a density functional calculation.

Recently, manganese-oxide compounds have attracted considerable attention, in particular, as candidate materials for photochemical water-splitting reactions. Here, we investigate electronic states of pristine manganese dioxides (MnO2) in different crystal phases using spin-polarized density functional theory (DFT) with Hubbard U correction. Geometrical structures and band dispersions of α-, β-,...

Orbital Angular Momentum Origin of Rashba-type Surface Band Splitting

Seung Ryong Park, Choong H. Kim, Jaejun Yu, Jung Hoon Han, Changyoung Kim Department of physics, University of Colorado at Boulder, Boulder, Colorado 80309, USA 2 Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea Department of Physics and BK21 Physics Research Division, Sungkyunkwan University, Suwon 440-746, Korea and Institute of Physics and Applied Physics,...

Renormalization in momentum dependent resummations

At finite temperature and in non-equilibrium environments we have to resum perturbation theory to avoid infrared divergences. Since resummation shuffles the perturbative orders, renormalizability is a nontrivial issue. In this paper we demonstrate that one can modify any type of resummations – even if it is momentum dependent, or it resums higher point functions – in a way that it is renormaliz...

Two-dimensional magnetic interactions in LaFeAsO

Band structure of silicon as measured in extended momentum space

Direct measurement of the wave function or at least the modulus squared of the wave function, the spectral function is an important goal in electron spectroscopy. This requires a state-selective i.e., energy resolved measurement of the momentum density in all of momentum space, not just the reduced Brillouin zone. Photoemission has been used very successfully to measure dispersion, mainly in th...