Quantum oscillations in screening in a two-dimensional electron gas |
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Authors: | T.K. Lee J.J. Quinn |
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Affiliation: | Department of Physics, Brown University, Providence, Rhode Island 02912, USA |
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Abstract: | The static dielectric constant of a two-dimensional electron gas is studied as a function of the strength of a dc magnetic field applied normal to the plane of the electron gas. At high temperatures the static dielectric function is independent of magnetic field, and for long wavelengths is given by ? ? ?0 + 2nvme2/q, where ?0 is the background dielectric constant and nv is the valley degeneracy. At low-temperatures, quantum oscillations become important and dramatically modify the screening. |
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