10.18453/rosdok_id00005672 Kleinschmidt, Uwe Uwe Kleinschmidt http://d-nb.info/gnd/1412489040 https://orcid.org/0000-0001-6164-4828 Universität Rostock 2025 500 Natural sciences 530 Physics 2025 en https://purl.uni-rostock.de/rosdok/id00005672 urn:nbn:de:gbv:28-rosdok_id00005672-8 Understanding the transport properties of light elements like hydrogen and heavy elements such as iron plays an important role in astrophysics in the dynamo processes in planets and stars. While the material properties of hydrogen and iron are very well known under normal conditions, they are mainly unknown under conditions in gas giant planets, stars, or even in the center of our Earth. This work investigates the electrical and thermal conductivity of hydrogen and iron under these extreme conditions using ab initio methods and analytical conductivity models.