Abstract
An exact formula for the nondiagonal part of the one-particle temperature Green’s function is obtained within the framework of the nonperturbative canonical formulation of the finite-temperature generalized Ward-Takahashi relation. It is shown that the Landau-level Green’s function for two-dimensional electrons has a nonvanishing nondiagonal part if the electron-electron interaction is included.
Publication Details
This article was originally published as: Toyoda, T, Takahashi, Y & Zhang, C, Exact formula for nondiagonal Green’s functions in condensed-matter physics, Physical Review B, 1994, 50(24), 18640-18643. Copyright 2000 American Physical Society. The original journal can be found here.