d-Wave Superconductivity and Pomeranchuk Instability in the Two-Dimensional Hubbard Model
Christoph J. Halboth, Walter Metzner
DOI 10.1103/PhysRevLett.85.5162 · Physical Review Letters
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Abstract
We present a systematic stability analysis for the two-dimensional Hubbard model, which is based on a new renormalization group method for interacting Fermi systems. The flow of effective interactions and susceptibilities confirms the expected existence of a d-wave pairing instability driven by antiferromagnetic spin fluctuations. More unexpectedly, we find that strong forward scattering interactions develop which may lead to a Pomeranchuk instability breaking the tetragonal symmetry of the Fermi surface.
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