Two-dimensional Fermi liquid with fixed chemical potential

Two-dimensional Fermi liquid with fixed chemical potential

Non-Fermi Liquid in a Truncated Two-Dimensional Fermi Surface

Using perturbation theory and the field theoretical renormalization group approach we consider a two-dimensional anisotropic truncated Fermi Surface(FS) with both flat and curved sectors which approximately simulates the “cold” and “hot” spots in the cuprate superconductors. We calculate the one-particle two-loop irreducible functions Γ and Γ as well as the spin, the charge and pairing response...

Marginal-Fermi-liquid behavior from two-dimensional Coulomb interaction

A full, nonperturbative renormalization group analysis of interacting electrons in a graphite layer is performed, in order to investigate the deviations from Fermi-liquid theory that have been observed in the experimental measures of a linear quasiparticle decay rate in graphite. The electrons are coupled through Coulomb interactions, which remain unscreened due to the semimetallic character of...

Roton Fermi liquid: A metallic phase of two-dimensional electrons

We introduce and analyze a metallic phase of two-dimensional s2Dd electrons, the roton Fermi liquid sRFLd, which, in contrast to the Landau–Fermi liquid, supports both gapless fermionic and bosonic quasiparticle excitations. The RFL is accessed using a reformulation of 2D electrons consisting of fermionic quasiparticles and hc /2e vortices interacting with a mutual long-ranged statistical inter...

A Two Dimensional Fermi Liquid Part 2: Convergence

Using results established in other papers in our series, we prove the existence of the infinite volume, temperature zero, thermodynamic Green’s functions of a two dimensional, weakly coupled fermion gas with an asymmetric Fermi curve and short range interactions. This is done by showing that our sequence of renormalization group maps converges. ∗ Research supported in part by the Natural Scienc...