American physicist (1937–2021)
Mahan
Gerald Dennis Mahan was an American condensed matter physicist, with specific research interests in transport and optical properties of materials, and solid-state devices.
He is recognized for his work in quantum thermoelectricity and the invention of the zinc oxide varistor. He is also developed the time-dependent local-density approximation (TDLDA) and its author of various books in quantum many-body physics.
Text adapted from Wikipedia, CC BY-SA 4.0. Photograph: Dietmar Rabich (see Commons), Wikimedia Commons.