: a population of free electrons in a vacuum or in a metallic conductor
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This layer of electrons—called a two-dimensional electron gas (2DEG)—is highly concentrated and moves with little resistance.—IEEE Spectrum, 11 Aug. 2025 Using an approach proposed four years ago, physicists sent an electron gas through a teeny-tiny particle collider to tease out weird behaviors — especially fractional electric charges — that only arise if anyons are around.—Stephen Ornes, Discover Magazine, 12 Dec. 2020 Quantum fluctuations may cause that solid to sublime, producing materials in which the electrons move freely — a kind of electron gas.—Quanta Magazine, 28 Feb. 2017
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