Non-Fermi Liquid

https://en.wikipedia.org/wiki/Fermi_liquid_theory

Marginal Fermi Liquid

• 1989 Phenomenology of the Normal State of Cu-0 High-Temperature Superconductors
  C. M. Varma, P. B. Littlewood, and S. Schmitt-Rink and E. Abrahams and A. E. Ruckenstein

• Varma singular Fermi liquids

• Littlewood The “old” marginal Fermi liquid “theory”

http://physics.gu.se/~tfkhj/QuantumMatter/Schoefield.pdf

http://www.physics.rutgers.edu/~coleman/620/mbody/unfinished_frontier.pdf