Robert Wichard Pohl

| birth_place = Hamburg, German Empire | death_date = | death_place = Göttingen, West Germany | fields = Solid state physics | workplaces = Humboldt University of Berlin
University of Göttingen | children = Robert Otto Pohl | alma_mater = University of Heidelberg
Humboldt University of Berlin | doctoral_advisor = Emil Warburg | known_for= F-center | relatives = Erwin Madelung (brother-in-law) }} Robert Wichard Pohl (10 August 1884 – 5 June 1976) was a German physicist and professor of the University of Göttingen. The physical institute in Göttingen led by Pohl was one of the first schools in solid state physics and Nevill Francis Mott described Pohl as the "father of solid state physics.". He is known for relating color in alkali metal halides with the presence of vacancies and F-centers (also called color centers), a type of crystallographic defect. He also demonstrated the first transistor based on color centers. The Gudden–Pohl effect and the Pohl torsion pendulum () are named after him. Provided by Wikipedia