Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 37: Posters: Plasmonics, Electronic Structure and Spin-Orbit Interaction, Semiconductor and Insulator Surfaces, Nanostructures

O 37.54: Poster

Dienstag, 1. April 2014, 18:30–22:00, P2

Photoemission calculations for surface states in 2DEGs within the models of k^→ · p^→ theory — •Markus Flieger, Jürgen Henk, and Ingrid Mertig — Martin-Luther-Universität Halle-Wittenberg, Germany

Surface states in two-dimensional electron gases like Rasbha-split and topological surface states attracted recently a lot of attention due to their unique electronic structure and spin texture. An appropriate method for investigating them is spin- and angle-resolved photoelectron spectroscopy (SPARPES).

These kinds of surface states are well described by model Hamiltonians which are derived within k^→ · p^→ perturbation theory. We report on analyses for model Hamiltonians of systems with different symmetries in the process of photoemission. In addition, we compare theoretical intensities and spin polarizations of the photoelectrons with results from experiments and ab initio calculations.