Andre Geim coauthored measurements showing that electric charge carriers in graphene can behave as effectively massless quasiparticles described by the Dirac equation. The 2005 experiments found an unusual sequence of quantum Hall effect plateaus and an oscillation phase associated with Berry phase. Here the Dirac description concerns low-energy quasiparticles in a carbon lattice, rather than free electrons acquiring zero rest mass. The results connect a readily contacted material with concepts usually introduced in relativistic quantum mechanics.[ref]
A physicist researching condensed matter physics, including graphene.[ref]
Sir Andre Geim FRS by Royal Society. Independent professional identity
Portrait of Andre Geim
. Bengt Oberger, own photograph, 9 December 2018. Creative Commons Attribution-Share Alike 4.0 International., via Wikimedia Commons. Source. Articles by others on the same topic
Andre Geim is a Russian-born physicist known for his groundbreaking work in the field of condensed matter physics. He was awarded the Nobel Prize in Physics in 2010, which he shared with Konstantin Novoselov, for their discovery of graphene, a single layer of carbon atoms arranged in a two-dimensional lattice. This material has remarkable properties, such as high electrical conductivity, mechanical strength, and flexibility, making it an object of significant interest in various scientific and engineering domains.