Effects of the Backward Scattering in Two-Dimensional Electron System
Abstract
Effects of the backward scattering with large momentum transfer are examined in two-dimensional electron system with a special emphasis on electrons around (π,0), (0,π). The phase diagram is shown in the plane of temperature T and hole doping δ in the mean field approximation and it is found that d-wave superconductivity, antiferromagnetism and π-triplet pair can coexist near half filling.
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