: a population of free electrons in a vacuum or in a metallic conductor
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Illustration: University of California, Santa Barbara But the new geometry also allows for further improvements by positioning the gate even closer to the electron gas, giving it better control.—IEEE Spectrum, 24 Sep. 2020 HEMTs have a layered semiconductor structure that creates a super-narrow region of free electrons, called a two-dimensional electron gas.—IEEE Spectrum, 8 Mar. 2023 When the device is on (when 6 V are applied to the gate), electrons flow from the drain to the source in a flat region called a two-dimensional electron gas.—IEEE Spectrum, 26 Mar. 2023 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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