paper

Luttinger-volume violating Fermi liquid in the pseudogap phase of the cuprate superconductors

arXiv:1109.0406 · doi:10.1103/PhysRevB.85.134519

Abstract

Based on the NMR measurements on BiSrLaCuO (La-Bi2201) in strong magnetic fields, we identify the non-superconducting pseudogap phase in the cuprates as a Luttinger-volume violating Fermi liquid (LvvFL). This state is a zero temperature quantum liquid that does not break translational symmetry, and yet, the Fermi surface encloses a volume smaller than the large one given by the Luttinger theorem. The particle number enclosed by the small Fermi surface in the LvvFL equals the doping level , not the total electron number . Both the phase string theory and the dopon theory are introduced to describe the LvvFL. For the dopon theory, we can obtain a semi-quantitative agreement with the NMR experiments.

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