Truncation of a 2-dimensional Fermi surface due to quasiparticle gap formation at the saddle points

Abstract

We study a two-dimensional Fermi liquid with a Fermi surface containing the saddle points $(\pi ,0)$ and $(0,\pi )$. Including Cooper and Peierls channel contributions leads to a one-loop renormalization group flow to strong coupling for short range repulsive interactions. In a certain parameter range the characteristics of the fixed point, opening of a spin and charge gap and dominant pairing correlations are similar to those of a 2-leg ladder at half-filling. An increase of the electron density we argue leads to a truncation of the Fermi surface with only 4 disconnected arcs remaining.

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References in corpus (2)

• Destruction of the Fermi Surface in Underdoped High Tc Superconductors
• Instability of a Landau Fermi liquid as the Mott insulator is approached

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