Infrared behaviour of metallic systems in one,two and three dimensions |
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Authors: | H Hinkelmann |
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Institution: | (1) Institut Laue-Langevin, 156 X Centre de Tri, F-38042 Grenoble Cedex, France |
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Abstract: | A simple approximate expression for the electron lifetime ( ) in metals is rederived and discussed for different dimensions. In the 3D-case we get the well known Drude behaviour, i.e. a constant . In one dimension ( ) is strongly frequency-dependent in the IR. The 2D-case is intermediate to the preceding ones. These results are essentially due to the different form of the Fermi surface for an electron gas in one, two and three dimensions. |
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