Dr Joachim Sonntag studied physics at the Technical University of Dresden. From 1972 until 1989 he worked at the Central Institute for Solid State Physics and Materials Research in Dresden specializing in electron structure in metallic alloys. He then moved to Dortmund and worked for HL-Planartechnik GmbH as a developer for temperature and radiation sensors. Joachim Sonntag specializes in radiation physics, multi-phase alloys and nanomaterials, for which he has published a number of foundational works in leading international journals. From him came the formulas/theory on thermoelectric force (2005; 2017), on the Hall Effect and Giant Hall Effect (2016) and on electron redistribution in composites (1989) (details: www.sonntag-physik.de). At the beginning of 2019, together with two other colleagues, he published his most recent article, a specialist review with the title: Electronic Transport in Alloys with Phase Separation (Composites): https: //www.scirp.org/Journal/PaperInformation.aspx?PaperID=9021