Two-Loop Renormalization of the Quasiparticle Weight in Two-Dimensional Electron Systems
Jun-ichiro Kishine, Nobuo Furukawa, Kenji Yonemitsu
Abstract
We apply the renormalization-group (RG) approach to two model systems where the two-dimensional Fermi surface has portions which give rise to the logarithmically singular two-loop self-energy process.
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