Soft Fermi Surfaces and Breakdown of Fermi Liquid Behavior

Details Soft Fermi Surfaces and Breakdown of Fermi Liquid Behavior Soft Fermi Surfaces and Breakdown of Fermi Liquid Behavior

2003-03-09

arxiv.org/abs/cond-mat/0303154v2

Phys. Rev. Lett. 91, 066402 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, 2 figures, revised version as published

Scientific paper

10.1103/PhysRevLett.91.066402

Electron-electron interactions can induce Fermi surface deformations which break the point-group symmetry of the lattice structure of the system. In the vicinity of such a "Pomeranchuk instability" the Fermi surface is easily deformed by anisotropic perturbations, and exhibits enhanced collective fluctuations. We show that critical Fermi surface fluctuations near a d-wave Pomeranchuk instability in two dimensions lead to large anisotropic decay rates for single-particle excitations, which destroy Fermi liquid behavior over the whole surface except at the Brillouin zone diagonal.

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