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Deformation of anisotropic Fermi surfaces due to electron-electron interactions
Authors
F Guinea
MP López-Sancho
R Roldán
SW Tsai
Publication date
15 December 2006
Publisher
eScholarship, University of California
Abstract
We analyze the deformations of the Fermi surface induced by electron-electron interactions in anisotropic two-dimensional systems. We use perturbation theory to treat, on the same footing, the regular and singular regions of the Fermi surface. It is shown that, even for weak local coupling, the self-energy presents a nontrivial behavior showing momentum dependence and interplay with the Fermi surface shape. Our scheme gives simple analytical expressions based on local features of the Fermi surface. © EDP Sciences
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Last time updated on 25/12/2021